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  • apt-get update stuck on "Waiting for Headers"

    - by crasic
    I'm setting up a Maverick server on a spare PC. The install completes fine and the system boots up into the shell. However, when I try to do a apt-get update , apt hangs on almost every entry with the message 99% [Waiting for headers] sometimes a message of 96 b/s appears on the far right. The actual percent that it claims also varies. Searching around online gave a potential solution by using the option Acquire::http::Pipeline-Depth="0" this somewhat alleviates the problem, i.e. it stalls on every other entry with the same message as above. If you wait it out (the whole update took about 4 hours), the update still fails as a good portion of the hits show a "unable to connect" or similar message, despite the fact that I can ping the server from the pc just fine. The problem is also unrelated to the mirror used since I've tried about a dozen mirrors with no success, I've even tried commenting out everything but the main entry in sources.list and it still refuses to update. The network connection is fine since I can ping and wget (apt won't let me install lynx until I run a successful update) just fine. I've also reinstalled the distro with no luck. The only thing weird about the setup is that the PC is connecting to the internet through my windows laptop with ICS configured properly, but as I've said before, the network connection is fine.

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  • Stuck on Ubuntu Startup Screen

    - by Pietro
    Since yesterday, my system won't get past the startup screen (the Ubuntu logo with the blinking red dots). I left it for over an hour and didn't get the login screen. It was working normally before that and I don't recall any changes (no new software, etc). I can login through the terminal with ALT+F1 but I don't know what to do to get the graphic mode. The command startx fails. I'm running Ubuntu 12.10 64 bits on a Core I5 with Intel motherboard. No video card or sound card.

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  • Collision detection - player gets stuck in platform when jumping

    - by Sun
    So I'm having some problems with my collision detection with my platformer. Take the image below as an example. When I'm running right I am unable to go through the platform, but when I hold my right key and jump, I end up going through the object as shown in the image, below is the code im using: if(shapePlatform.intersects(player.getCollisionShape())){ Vector2f vectorSide = new Vector2f(shapePlatform.getCenter()[0] - player.getCollisionShape().getCenter()[0], shapePlatform.getCenter()[1] - player.getCollisionShape().getCenter()[1]); player.setVerticleSpeed(0f); player.setJumping(false); if(vectorSide.x > 0 && !(vectorSide.y > 0)){ player.getPosition().set(player.getPosition().x-3, player.getPosition().y); }else if(vectorSide.y > 0){ player.getPosition().set(player.getPosition().x, player.getPosition().y); }else if(vectorSide.x < 0 && !(vectorSide.y > 0)){ player.getPosition().set(player.getPosition().x+3, player.getPosition().y); } } I'm basically getting the difference between the centre of the player and the centre of the colliding platform to determine which side the player is colliding with. When my player jumps and walks right on the platform he goes right through. The same can also be observed when I jump on the actual platform, should I be resetting the players y in this situation?

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  • totally stuck trying to SSHing remote server

    - by user9609
    Hey guys, So i've been given access to ssh a server. I have the username/password, but server apparently requires a public key (now bear in mind that i am a noob in ssh). When I do: ssh -p 52 [email protected] terminal says Permission denied (publickey). So I went using ssh-keygen -t rsa and got myself the id_rsa and id_rsa.pub files in /root/.ssh. Chmoded /root/.ssh to 700 and /root/.ssh/* to 600. Tried sshing server.com again, same error. What am I missing? I've been given a Putty Pagant Key file (.ppk) by the SYSADMIN of server.com. Apparently, other users (all Windows) can connect using Putty Pagant.exe. Please help :)

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  • List item stuck in "Pending"

    - by Norgean
    Problem simplified: On approval, you have an event receiver that changes a field according to some weird and wonderful business logic. But the item remains in "Pending" state. Why?   First, you obviously need to turn off the event handling when you change things in the event receiver. If not, the event receiver will be called because the item changed. Infinite recursion is a bad thing. But you guessed that.   But that's not what was wrong. The culprit in my case was that items are set to require a new approval whenever the item is changed. This is good, but not what we want in this particular case. So force it back to approved after the other column has been changed.

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  • Update get's stuck unpacking bad package, won't continue without it

    - by Shazzner
    Removing the package from cache, and disabling Recommended Updates in Software Sources gives me an error saying I need to install this package. I've tried to update several times, but it keeps hanging on unpacking the ubuntu-sso-client package. Which forces me to hard-reset to unlock the package manager. I've tried: sudo dpkg --configure -a No errors sudo apt-get upgrade --fix-broken Wants me to reinstall said package, resulting in it hanging Removing the package: sudo rm -f /var/cache/apt/archives/ubuntu-sso-client_1.0.8-0ubuntu1_all.deb Results in the same effect, it re-downloads then hangs I can de-select Recommended Updates but I get error messages when I try to update again: E: The package ubuntu-sso-client needs to be reinstalled, but I can't find an archive for it. Which won't let me continue Finally re-enabling the source, I try to remove ubuntu-sso sudo apt-get remove ubuntu-sso-client It removes a bunch of other packages but complains about the package: dpkg: error processing ubuntu-sso-client (--remove): Package is in a very bad inconsistent state - you should reinstall it before attempting a removal. Reinstalling ubuntu-sso-client hangs :( I'm at my wits end, any ideas? I would be nice to install all the other updates but this one is preventing it.

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  • Laptop's battery is stuck on "estimating"?

    - by xd1936
    Hello! After installing Ubuntu 10.10, the battery indicator worked fine (both percent remaining and estimation on time). I then installed and configured some software (Skype, Pidgin, Thunderbird, removed Empathy and Evolution, ect) and the battery meter, when clicked, always says "(estimating...)" I've tried running the battery down to zero and charging it fully again. If I go into the history or details, the percentage is recorded correctly. Any ideas?

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  • Upgrading Ubuntu to 12.04 stuck

    - by Chris Britt
    While upgrading from 11.10 to 12.04, I'm stalled at the step: Installing new version of config file /etc/init/udevtrigger.conf The Terminal in the Distribution Upgrade window is expanded, there is no prompt for user input. I've hit enter a few times but it doesn't change anything but add a blank line after the last print statement. It's been sitting for ~6 hours at this stage. No other windows or dialog boxes are open. The upgrade has progressed through "Preparing to Upgrade", "Setting new software channels", and "Getting new packages". Under the progress bar (which estimates 1 day 2 hours remaining, and has for some time), it says Preparing to configure libpcap0.8. I'd take a screen-shot, but it won't let me save the file anywhere. The progress bar is about 1/3 complete.

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  • Using fix-boot but still stuck

    - by user92498
    I have a laptop I used to use for college that was Ubuntu 10.4 /Vista / Win7. I pulled it out and proceeded to install 12.04 advanced partitioning. It was sda1 ubuntu / swap / vista / and sda5 win7. I deleted the ubuntu, swap and vista, leaving 7 alone. I'm using it now but can't get to win7. I used fix-boot several times using variations on the advanced menus. So I finally purged grub and forced grup-pc in the advanced setting of fix-boot. Here is a link to the report; http://paste.ubuntu.com/1225051/ I'm sure there is a way to edit the grub to get 7 to show as a boot choice and hope someone can point it out for me. Thanks

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  • Application stuck in TCP retransmit

    - by SandeepJ
    I am running Linux kernel 3.13 (Ubuntu 14.04) on two Virtual Machines each of which operates inside two different servers running ESXi 5.1. There is a zeromq client-server application running between the two VMs. After running for about 10-30 minutes, this application consistently hangs due to inability to retransmit a lost packet. When I run the same setup over Ubuntu 12.04 (Linux 3.11), the application never fails If you notice below, "ss" (socket statistics) shows 1 packet lost, sk_wmem_queued of 14110 (i.e. w14110) and a high rto (120000). State Recv-Q Send-Q Local Address:Port Peer Address:Port ESTAB 0 12350 192.168.2.122:41808 192.168.2.172:55550 timer:(on,16sec,10) uid:1000 ino:35042 sk:ffff880035bcb100 <- skmem:(r0,rb648720,t0,tb1164800,f2274,w14110,o0,bl0) ts sack cubic wscale:7,7 rto:120000 rtt:7.5/3 ato:40 mss:8948 cwnd:1 ssthresh:21 send 9.5Mbps unacked:1 retrans:1/10 lost:1 rcv_rtt:1476 rcv_space:37621 Since this has happened so consistently, I was able to capture the TCP log in wireshark. I found that the packet which is lost does get retransmitted and even acknowledged by the TCP in the other OS (the sequence number is seen in the ACK), but the sender doesn't seem to understand this ACK and continues retransmitting. MTU is 9000 on both virtual machines and througout the route. The packets being sent are large in size. As I said earlier, this does not happen on Ubuntu 12.04 (kernel 3.11). So I did a diff on the TCP config options (seen via "sysctl -a |grep tcp ") between 14.04 and 12.04 and found the following differences. I also noticed that net.ipv4.tcp_mtu_probing=0 in both configurations. Left side is 3.11, right side is 3.13 <<net.ipv4.tcp_abc = 0 <<net.ipv4.tcp_cookie_size = 0 <<net.ipv4.tcp_dma_copybreak = 4096 14c11 << net.ipv4.tcp_early_retrans = 2 --- >> net.ipv4.tcp_early_retrans = 3 17c14 << net.ipv4.tcp_fastopen = 0 >> net.ipv4.tcp_fastopen = 1 20d16 << net.ipv4.tcp_frto_response = 0 26,27c22 << net.ipv4.tcp_max_orphans = 16384 << net.ipv4.tcp_max_ssthresh = 0 >> net.ipv4.tcp_max_orphans = 4096 29,30c24,25 << net.ipv4.tcp_max_tw_buckets = 16384 << net.ipv4.tcp_mem = 94377 125837 188754 >> net.ipv4.tcp_max_tw_buckets = 4096 >> net.ipv4.tcp_mem = 23352 31138 46704 34a30 >> net.ipv4.tcp_notsent_lowat = -1 My question to the networking experts on this forum : Are there any other debugging tools or options I can install/enable to dig further into why this TCP retransmit failure is occurring so consistently ? Are there any configuration changes which might account for this weird behaviour.

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  • stuck in busybox after update

    - by Lyra500
    I should start out by saying that I am not very tech savvy and have done my best to understand what is going on here from reading other people's posts and have fumbled my way through several attempted fixes without getting anywhere... I run ubuntu 12.04 on an admittedly cheap laptop from ebuyer and in spite of being cheap and not a brand laptop I have never had any major problems with it. Since updating to 12.04 when it was released the boot-up process has always been slow. Logging in takes about 30secs longer than it used to and if I closed my laptop and opened it again instead of being met with a login screen I'd be met with a black screen with a white mouse. As all of these problems had a behavior-changing fix (don't close laptop, patiently wait for login, etc.) I didn't think of reporting any of the issues. Last night when the update manager prompted me that there were updates available I duly did them as I usually do. At the time a bug report came up and I cannot remember what it said but I reported the bug as I was prompted to do. Then this morning when I started up my laptop it went through the usual sequence, GRUB, purple screen with 'ubuntu' etc. and then when it tried to boot up it went into BusyBox and I have not been able to do anything to solve this. I have tried going into the GRUB menu and starting previous versions but I come to the same point - busybox. I have borrowed another rather elderly laptop with Windows Vista to try and download Boot Repair and Ubuntu and burn them onto CD. I tried downloading boot repair five times, to laptop, CD and USB. Every time it would download and burn fine but then the windows laptop would tell me that 1% did not download properly and my laptop would not run the USB or CD upon booting. I then tried to download ubuntu and make a livecd, twice, but again was told that 1% did not download properly and again my laptop will not run ubuntu from the CD upon booting even if/when I went into the f2 menu and changed the menu priority (if that's what you call it) for booting up to make sure it was definitely trying the USB/CD first. This is the message I get from busybox: BusyBox v1.18.5 (Ubuntu 1:1.18.5-1ubuntu4) built-in shell (ash) Enter 'help' for a list of built-in commands I have tried 'exit' but it mentions things about 'kernal panic' and 'tried to quit init!' and 'can't find /root/dev/console : no such file'. I know that the problem is probably caused by a problem with a kernal caused by the update last night, but I couldn't honestly tell you exactly what was updated and without being able to boot from a livecd I'm not sure how to go about fixing this. As I said, I am not tech savvy and have done what I can to try and find a solution to the problem but I'm starting to feel like I'm out of options. Does anyone have any ideas?

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  • lightdm.conf content erased, now stuck in low graphics mode

    - by user79318
    This evening I was attempting to disable the guest account and something went awry. Currently on boot Ubuntu enters low graphics mode. No specific error report. What did I do? Before this error occurred I added a line of code in lightdm.conf to disable the guest account. I think I may have accidentally erased the contents of lightdm.conf. Not entirely sure. I troubleshooted for the past hour using various suggestions from other Questions to no avail.

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  • Stuck in screen saver during upgrade

    - by vinni_f
    I'm upgrading from 10.04 to 12.04. The screen saver is now on and I can't exit it. If I type my password or move the mouse the screen flickers. Regardless of what I do the screen saver stays and the login prompt never shows. If I type my password and then enter it, it does nothing. Last time I checked the packages were all downloaded and I was in the install process. I really want this upgrade to work. It would be really bad to have to restart from a fresh install. Cheers.

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  • Stuck in logon loop

    - by MJeffryes
    Here's the deal. I set up a computer with Ubuntu 10.04 for my grandmother. Everything worked fine. I connected it to the internet at her house today. After rebooting the computer I found that the computer would kick you back to the logon screen if you attempted to logon to her account. It worked fine logging on to my admin account, and also in Gnome's safe mode. I thought it had resolved itself, but turns out it hadn't, and now I don't have physical access to the computer, plus the remote connection I'd hoped to use only works intermittently. I need some suggestions for troubleshooting for when I'm at her house at some point next week. Ask for any more details, but I'm afraid I won't be able to provide many more until I've checked it out in person, since she is basically unable to use a computer beyond web browsing. Thanks in advance!

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  • Scanline filling of polygons that share edges and vertices

    - by Belgin
    In this picture (a perspective projection of an icosahedron), the scanline (red) intersects that vertex at the top. In an icosahedron each edge belongs to two triangles. From edge a, only one triangle is visible, the other one is in the back. Same for edge d. Also, in order to determine what color the current pixel should be, each polygon has a flag which can either be 'in' or 'out', depending upon where on the scanline we currently are. Flags are flipped according to the intersection of the scanline with the edges. Now, as we go from a to d (because all edges are intersected with the scanline at that vertex), this happens: the triangle behind triangle 1 and triangle 1 itself are set 'in', then 2 is set in and 1 is 'out', then 3 is set 'in', 2 is 'out' and finally 3 is 'out' and the one behind it is set 'in', which is not the desired behavior because we only need the triangles which are facing us to be set 'in', the rest should be 'out'. How do process the edges in the Active Edge List (a list of edges that are currently intersected by the scanline) so the right polys are set 'in'? Also, I should mention that the edges are unique, which means there exists an array of edges in the data structure of the icosahedron which are pointed to by edge pointers in each of the triangles.

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  • Writing to a D3DFMT_R32F render target clamps to 1

    - by Mike
    I'm currently implementing a picking system. I render some objects in a frame buffer, which has a render target, which has the D3DFMT_R32F format. For each mesh, I set an integer constant evaluator, which is its material index. My shader is simple: I output the position of each vertex, and for each pixel, I cast the material index in float, and assign this value to the Red channel: int ObjectIndex; float4x4 WvpXf : WorldViewProjection< string UIWidget = "None"; >; struct VS_INPUT { float3 Position : POSITION; }; struct VS_OUTPUT { float4 Position : POSITION; }; struct PS_OUTPUT { float4 Color : COLOR0; }; VS_OUTPUT VSMain( const VS_INPUT input ) { VS_OUTPUT output = (VS_OUTPUT)0; output.Position = mul( float4(input.Position, 1), WvpXf ); return output; } PS_OUTPUT PSMain( const VS_OUTPUT input, in float2 vpos : VPOS ) { PS_OUTPUT output = (PS_OUTPUT)0; output.Color.r = float( ObjectIndex ); output.Color.gba = 0.0f; return output; } technique Default { pass P0 { VertexShader = compile vs_3_0 VSMain(); PixelShader = compile ps_3_0 PSMain(); } } The problem I have, is that somehow, the values written in the render target are clamped between 0.0f and 1.0f. I've tried to change the rendertarget format, but I always get clamped values... I don't know what the root of the problem is. For information, I have a depth render target attached to the frame buffer. I disabled the blend in the render state the stencil is disabled Any ideas?

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  • Picking a suitable resolution for a modern low-res game?

    - by MrKatSwordfish
    I'm working on a 2D game project right now (using SFML+OpenGL and C++) and I'm trying to figure out how to go about choosing a resolution. I want my game to have a pixel resolution that is around that of classic '16bit' era consoles like the Super Nintendo or Neo Geo. However, I'd also like to have my game fit the 16:9 aspect ratio that most modern PC monitors use. Finally I'd like to be able to include an option for running full screen. I know that I could create my own low-res 16:9 resolution that is more-or-less around the size of SNES or NeoGeo games. However, the problem seems to be that doing so would leave me with a non-standard resolution that my monitor would not be able to support in fullscreen mode. For example, if i divide the common 16:9 resolution 1920x1080 by 4, I would get a 16:9 resolution that is relatively close to the resolution used by 16bit era games; 480x270. That would be fine in a windowed mode, but I don't think that it would be supported in fullscreen mode. How can I choose a resolution that suits my needs? Can I use something like 480x270? If so, how would I go about getting fullscreen mode to work with such a non-standard resolution? (I'm guessing OpenGL/SFML might have a way of up-scaling...but..)

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  • How to alter image pixels of a wild life bird?

    - by NoobScratcher
    Hello so I was hoping someone knew how to move or change color and position actual image pixels and could explain and show the code to do so. I know how to write pixels on a surface or screen-surface usigned int *ptr = static_cast <unsigned int *> (screen-pixels); int offset = y * (screen->pitch / sizeof(unsigned int)); ptr[offset + x] = color; But I don't know how to alter or manipulate a image pixel of a png image my thoughts on this was How do I get the values and locations of pixels and what do I have to write to make it happen? Then how do I actually change the values or locations of those gotten pixels and how do I make that happen? any ideas tip suggestions are also welcome! int main(int argc , char *argv[]) { SDL_Surface *Screen = SDL_SetVideoMode(640,480,32,SDL_SWSURFACE); SDL_Surface *Image; Image = IMG_Load("image.png"); bool done = false; SDL_Event event; while(!done) { SDL_FillRect(Screen,NULL,(0,0,0)); SDL_BlitSurface(Image,NULL,Screen,NULL); while(SDL_PollEvent(&event)) { switch(event.type) { case SDL_QUIT: return 0; break; } } SDL_Flip(Screen); } return 0; }

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  • Java: How to Make a Player Class in a Tile-Based RPG

    - by A.K.
    So I've been following a JavaHub tutorial that basically uses a pixel engine similar to MiniCraft. I've attempted to make a Player Class as such, and I'm basically making a mock Pokemon game for learning's sake: package pokemon.entity; import java.awt.Rectangle; import pokemon.gfx.Screen; import pokemon.levelgen.Tile; import pokemon.entity.SpritesManage;; public class Player { int x, y; int vx, vy; public Rectangle AshRec; public Sprite AshSprite; Screen screen; Sprite[][] AshSheet; public Player() { AshSprite = SpritesManage.AshSheet[1][0]; AshRec = new Rectangle(0, 0, 16, 16); x = 0; y = 0; vx = 1; vy = 1; screen.renderSprite(0, 0, AshSprite); } public void update() { move(); checkCollision(); } private void checkCollision() { } private void move() { AshRec.x += vx; AshRec.y += vy; } public void render(Screen screen, int x, int y) { screen.renderSprite(x, y, AshSprite); } } I guess what I really want to do is have the Player centered in the screen and have the sprite drawn based on an Input Handler. I'm just stumped as to how to sync these together.

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  • What is the standard way of using Q15 values?

    - by Alex
    To process 8-bit pixels, to do things like gamma correction without losing information, we normally upsample the values, work in 16 bits or whatever, and then downsample them to 8 bits. Now, this is a somewhat new area for me, so please excuse incorrect terminology etc. For my needs I have chosen to work in "non-standard" Q15, where I only use the upper half of the range (0.0-1.0), and 0x8000 represents 1.0 instead of -1.0. This makes it much easier to calculate things in C. But I ran into a problem with SSSE3. It has the PMULHRSW instruction which multiplies Q15 numbers, but it uses the "standard" range of Q15 is [-1,1-2?¹5], so multplying (my) 0x8000 (1.0) by 0x4000 (0.5) gives 0xC000 (-0.5), because it thinks 0x8000 is -1. This is quite annoying. What am I doing wrong? Should I keep my pixel values in the 0000-7FFF range? This kind of defeats the purpose of it being a fixed-point format. Is there a way around this? Maybe some trick? Is there some kind of definitive treatise on Q15 which discusses all this?

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  • Scaling sprite velocity / co-ordinatesin Android

    - by user22241
    I'm trying to find the answer to a question that I've had for a long time, but am having trouble finding it! I hope someone can help :-) I'm trying to find information on how to scale sprite velocity / movement / co-ordinates. What I mean by this is how do I get a sprite to move at the same speed relative to the screen size / DPI so that it takes the same amount of real-time to get from one side of the screen to the other? All of the posts pertaining to sprite scaling that I can find on the various forums relate to the size of the sprite, but this part of it I'm OK with so far, it's just that when I move a sprite, it kind of gets there at different speed depending on the dpi / resolution of the device. I hope I'm making sense. This is the code I have so far, instead of using explicit amounts, like 1, I'm using something like the following: platSpeedFloat= (1 * (dpi/160)); //Use '1' so on an MDPI screen, the sprite will move by 1 physical pixel Then basically what I'm doing is something like this: (all varialble previously declared) platSpeedSave+=platSpeedFloat; //Add the platSpeedFloat value to the current platSpeedSave value platSpeed=(int) platSpeedSave; //Cast to int so it can be checked in the following statement if (platSpeed==platSpeedSave) //Check the casted int value to float value stored previoiusly {floorY=floorY-platSpeed; //If they match then change the Y value platSpeedSave=0;} //Reset Would be grateful if someone could assists - hope I'm making sense. The above doesn't seems to work the sprite moves 'faster' on lower DPI screens. Thanks

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  • xterm window gets stuck after some time

    - by eSKay
    I am using xterm on RHEL with KDE. Usually after a couple of days, the xterm terminals get stuck i.e. I am not able to resize or relocate them. After this, even if I open a new terminal, it is stuck the same way. What I do is logout and login again. Is this a bug with xterm? Is there a known solution?

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  • HP 20gig iPod stuck on "AC Charge" icon

    - by Chris
    I have a HP edition iPod (20gig) and it is stuck on the "AC Charge" icon with the picture of the wall charger and an outlet. I tried to reset the device and it has been stuck on this icon for quite a while now. I have tried everything I can to try to reset it, and before I stoop to visiting an Apple store I want to see if anyone has any tricks up their sleeves. This is what the icon looks like:

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  • Server getting stuck while upgrading from ESX 3.5i to ESX3.5

    - by AmitPawar
    Hi All, i am getting the following error while upgrading the server from ESX3.5i to ESX3.5.. and the server gets Stuck. it says : Starting System Management Homepage:.......ok Starting HP Insight Manager Agents: ipmi_si : servching for PCI device 0x3302 ipmi_si : Trying "Kcs" at memory address 0xf7ef.... ipmi_si : Found PCI BMC at BAR address 0xf7ef.... In try_get_dev_id And the server gets stuck, had anyone seen this and how to resolve this? Thanks, Amit

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