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  • kvm:vga driver vbempg cause blue screen in guest os Windows XP

    - by hellolwq
    I don't know if the problem was well know,I searched the google,but didn't get anything useful. I configed the KVM guest vga mode as vga std and got a yellow exclamation sign with the vga in the XP guest OS. so I found the vbempg.zip in the follow address: http://forum.ubuntu.org.cn/download/file.php?id=45928&sid=b394b9ca338fdca59a4174c5ee4dee26 Some often,I could get a blue screen crash.Any one could give some further information?

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  • Redhat linux terminal garbage output when using telnet

    - by Dinesh
    I am using redhat-linux terminal to connect to a router device by means of 'telnet'. While the device boots, the characters are getting printed in garbage manner which is as follows, In terminal, If I click on the the menu 'Terminal'-- 'Reset', then it is getting changed to proper alphabetical. Is there any way available to prevent it ? I have tried setting the encoding of the terminal to UTF-8 from the menu options. But, still the same issue.

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  • Partition table corrupted (USB flash drive)

    - by 13ren
    It's an 8 GB Patriot thumb drive, which I've used extensively with lots of data. Today, it is detected, but all data is gone: (EDIT at least some data is still there, but the partition table is gone) EDIT @Sathya (thanks) here's the relevant output from sudo fdisk -l: Disk /dev/sdc: 8019 MB, 8019509248 bytes 247 heads, 62 sectors/track, 1022 cylinders Units = cylinders of 15314 * 512 = 7840768 bytes Disk /dev/sdc doesn't contain a valid partition table It looks like it is /dev/sdc, with that 8 GB... and no partition table. I tried to mount /dev/sdc (and then dmesg | tail): /media> sudo mount /dev/sdc mytmp mount: wrong fs type, bad option, bad superblock on /dev/sdc, missing codepage or other error In some cases useful info is found in syslog - try dmesg | tail or so /media> dmesg | tail [ 24.300000] sdc: unknown partition table [ 24.320000] sd 2:0:0:0: Attached scsi removable disk sdc [ 24.370000] usb-storage: device scan complete [ 26.870000] EXT2-fs error (device sdc): ext2_check_descriptors: Block bitmap for group 1 not in group (block 0)! [ 26.870000] EXT2-fs: group descriptors corrupted! [ 50.420000] unhashed dentry being revalidated: .DCOPserver_eeepc-brendanma__0 [ 50.430000] unhashed dentry being revalidated: .DCOPserver_eeepc-brendanma__0 [ 50.430000] unhashed dentry being revalidated: .DCOPserver_eeepc-brendanma__0 [ 5565.470000] EXT2-fs error (device sdc): ext2_check_descriptors: Block bitmap for group 1 not in group (block 0)! [ 5565.470000] EXT2-fs: group descriptors corrupted! EDIT @Col: results from testdisk Disk /dev/sdc - 8013 MB / 7642 MiB - CHS 1022 247 62 Current partition structure: Partition Start End Size in sectors Partition sector doesn't have the endmark 0xAA55 After I hit [proceed], it says: Structure: Ok. Keys A: add partition, L: load backup, Enter: to continue The "Structure: Ok." seems reassuring... will "A: add partition" make my old data accessible (if it's still there), or will it make a new, fresh partition? Another option is "[ MBR Code ] Write TestDisk MBR code to first sector" - would it be better to do this? EDIT I found that at least some of my data is still on the flash drive, by using the below, and searching for English text in less (like " the "): cat /dev/sde | tr -cd '\11\12\40\1540-\176' | less (The drive changed from "/dev/sdb" to "/dev/sde" because I connected some extra drives today). I've learnt that "/dev/sde1" would be the first partition; and "/dev/sde" is the whole drive. Because unix treats these devices just like files, you can use all the ordinary unix file commands on them, like cat, and then process them like any other stream of data. The tr above removes non-printable characters ("\40" is space, which I wanted to preserve). In less, you can use "/" to search, similar to Vim. How can I get my data back (assuming it's still there)? If only the partition table is corrupted, is there a standard "partition recovery tool"? Is there a way to "repartition" without deleting everything?

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  • Linux - real-world hardware RAID controller tuning (scsi and cciss)

    - by ewwhite
    Most of the Linux systems I manage feature hardware RAID controllers (mostly HP Smart Array). They're all running RHEL or CentOS. I'm looking for real-world tunables to help optimize performance for setups that incorporate hardware RAID controllers with SAS disks (Smart Array, Perc, LSI, etc.) and battery-backed or flash-backed cache. Assume RAID 1+0 and multiple spindles (4+ disks). I spend a considerable amount of time tuning Linux network settings for low-latency and financial trading applications. But many of those options are well-documented (changing send/receive buffers, modifying TCP window settings, etc.). What are engineers doing on the storage side? Historically, I've made changes to the I/O scheduling elevator, recently opting for the deadline and noop schedulers to improve performance within my applications. As RHEL versions have progressed, I've also noticed that the compiled-in defaults for SCSI and CCISS block devices have changed as well. This has had an impact on the recommended storage subsystem settings over time. However, it's been awhile since I've seen any clear recommendations. And I know that the OS defaults aren't optimal. For example, it seems that the default read-ahead buffer of 128kb is extremely small for a deployment on server-class hardware. The following articles explore the performance impact of changing read-ahead cache and nr_requests values on the block queues. http://zackreed.me/articles/54-hp-smart-array-p410-controller-tuning http://www.overclock.net/t/515068/tuning-a-hp-smart-array-p400-with-linux-why-tuning-really-matters http://yoshinorimatsunobu.blogspot.com/2009/04/linux-io-scheduler-queue-size-and.html For example, these are suggested changes for an HP Smart Array RAID controller: echo "noop" > /sys/block/cciss\!c0d0/queue/scheduler blockdev --setra 65536 /dev/cciss/c0d0 echo 512 > /sys/block/cciss\!c0d0/queue/nr_requests echo 2048 > /sys/block/cciss\!c0d0/queue/read_ahead_kb What else can be reliably tuned to improve storage performance? I'm specifically looking for sysctl and sysfs options in production scenarios.

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  • Graphics Tablet as input device for Windows 8

    - by Arcath
    Having used Windows 8 (and 8.1) on a touch screen I know how much better it is than with a mouse. I've seen people with graphics tables on 7 use them to scroll their browser etc... so I was wondering if I could use one as a touch screen for windows? and if did would the 8 features of swipe in from the sides etc... work properly? Just incase brand is an issue in this I was looking at getting a Wacom.

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  • How to automatically show USB camera or memory stick contents in Icewm?

    - by darenw
    I normally use a very lightweight Linux setup. No desktop like Gnome or KDE, just Icewm as the windows manager and nothing else that normal users might consider essential. Well, I do need a file manager - I use Thunar. Recently I've been trying Gnome. Whenever I shove a memory stick into a USB port, or connect my digital camera, it can automatically pop up a file manager showing all the goodies on that device. KDE does this too. I like this. Although quick at the command line, I like not having to go sudo to mount the device and all that. If I want to stick with a lightweight setup using Icewm+Thunar, is there something non-huge I can install to make external devices fire up a Thunar window, or otherwise make access to the contents brainlessly easy?

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  • losetup does not decrypt device in Ubuntu 11.4 as before

    - by Kay
    I had an external volume mounted using losetup for about two years. It was created using Ubuntu 9.4 and I used the same Ubuntu installation throughout all dist upgrades. Now as I bought a new laptop I set up a fresh Ubuntu 11.4 installation on it. Problem is: losetup -e twofish /dev/loop0 /dev/sdb2 does not decrypt the volume anymore. The data in /dev/loop0 contains apparently random data. I am sure I entered the correct password. I modprobe'd cryptoloop and twofish. My question is: Has Canonical done some obscure changes to losetup like adding a salt? Does losetup depend on configuration files I did not know about? How can I decrypt the volume on my now laptop?

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  • How can I check whether a volume is mounted where it is supposed to be using Python?

    - by Ben Hymers
    I've got a backup script written in Python which creates the destination directory before copying the source directory to it. I've configured it to use /external-backup as the destination, which is where I mount an external hard drive. I just ran the script without the hard drive being turned on (or being mounted) and found that it was working as normal, albeit making a backup on the internal hard drive, which has nowhere near enough space to back itself up. My question is: how can I check whether the volume is mounted in the right place before writing to it? If I can detect that /external-backup isn't mounted, I can prevent writing to it. The bonus question is why was this allowed, when the OS knows that directory is supposed to live on another device, and what would happen to the data (on the internal hard drive) should I later mount that device (the external hard drive)? Clearly there can't be two copies on different devices at the same path! Thanks in advance!

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  • Using physical disk with VMware Workstation

    - by chx
    I am using VMware Workstation 9.0 under Windows 7 and trying to load my Linux from Physicaldisk0. And it boots, grub sees the two partitions on the disk (I checked in command line) and the kernel and the initrd loads and then it stops saying "device not found"and drops me into an emergency shell. Indeed there is absolutely nothing in /dev not the /sda device it expects not /hda nothing that looks like a disk. Edit: I can boot the Linux disk just fine if I boot it from BIOS and not as a VM. Edit2: The question is, how can I make this setup work?

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  • RDP failing due to Audit Failure on the IPSec driver

    - by paulwhit
    I am trying to RDP into a Windows 7 Hyper-V image connected to a corporate network that publishes IPSec policies via Active Directory. I am seeing this error in the log: IPsec dropped an inbound clear text packet that should have been secured. If the remote computer is configured with a Request Outbound IPsec policy, this might be benign and expected. This can also be caused by the remote computer changing its IPsec policy without informing this computer. This could also be a spoofing attack attempt. Remote Network Address: XXX.XXX.XXX.XXX Inbound SA SPI: 0 How do I change my settings on the computer using RDP to something suitable for the domain-joined Hyper-V image?

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  • Windows XP install driver notification for AirCard

    - by Brian
    A co-worker of mine is using an air-card. It prompted him to install software in the notification tray, but he clicked on the wrong thing and the icon went away without him installing that software. How can I get that icon back? He can't install the software then. I know that you can download the software from the site, but we did that and were having issues from that too. Restarting and trying again doesn't pop up the notification either. Thanks.

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  • saving and searching encrypted mail

    - by student
    I often send and receive gpg-encrypted mail. At the moment I use thunderbird + enigmail (in linux) to do that. As far as I know there is no way in thunderbird to find all encrypted messages which bodies contain particular keywords. There also seems to be no option to save encrypted mails decrypted (so they would be searchable). However for me it is important to be able to search old encrypted mails. So my question is: Is there a way in linux to save incoming mails automatically decrypted in my inbox and save outgoing encrypted mail decrypted in the send folder? Both times adding a line to the body which remarks that the mail was encrypted. It could be another email client for linux that could to that or perhaps a solution using procmail or maildrop. For a procmail solution I guess there could be some problems with encoding (perhaps one have to use emil?) the solution should work well with german special characters in subject and body. Note that the solution should work for multipart encrypted messages (including encrypted attachments) too i.e. with everything which could thunderbird + enigmail generate. Further note that I don't want a discussion about security holes. For me it's ok if messages are stored decrypted on my harddrive (which is encrypted as a whole anyway). In doubt for a first solution it would be ok to store my private key passphrase in cleartext on my harddrive, too. The point is that the mails are encrypted on the mailserver or more generally on their "way through the net".

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  • What can cause kernel out_of_memory error?

    - by nbolton
    I'm running Debian GNU/Linux 5.0 and I'm experiencing intermittent out_of_memory errors coming from the kernel. The server stops responding to all but pings, and I have to reboot the server. # uname -a Linux xxx 2.6.18-164.9.1.el5xen #1 SMP Tue Dec 15 21:31:37 EST 2009 x86_64 GNU/Linux This seems to be the important bit from /var/log/messages Dec 28 20:16:25 slarti kernel: Call Trace: Dec 28 20:16:25 slarti kernel: [<ffffffff802bedff>] out_of_memory+0x8b/0x203 Dec 28 20:16:25 slarti kernel: [<ffffffff8020f825>] __alloc_pages+0x245/0x2ce Dec 28 20:16:25 slarti kernel: [<ffffffff8021377f>] __do_page_cache_readahead+0xc6/0x1ab Dec 28 20:16:25 slarti kernel: [<ffffffff80214015>] filemap_nopage+0x14c/0x360 Dec 28 20:16:25 slarti kernel: [<ffffffff80208ebc>] __handle_mm_fault+0x443/0x1337 Dec 28 20:16:25 slarti kernel: [<ffffffff8026766a>] do_page_fault+0xf7b/0x12e0 Dec 28 20:16:25 slarti kernel: [<ffffffff8026ef17>] monotonic_clock+0x35/0x7b Dec 28 20:16:25 slarti kernel: [<ffffffff80262da3>] thread_return+0x6c/0x113 Dec 28 20:16:25 slarti kernel: [<ffffffff8021afef>] remove_vma+0x4c/0x53 Dec 28 20:16:25 slarti kernel: [<ffffffff80264901>] _spin_lock_irqsave+0x9/0x14 Dec 28 20:16:25 slarti kernel: [<ffffffff8026082b>] error_exit+0x0/0x6e Full snippet here: http://pastebin.com/a7eWf7VZ I thought that perhaps the server was actually running out of memory (it has 1GB physical memory), but my Cacti memory graph looks OK to me... But strangely the load graph goes through the roof shortly before the kernel crashes: What logs can I look at for more info? Update: Maybe noteworthy - the CPU percentage and network traffic graphs were both normal at the time of the crash. The only abnormality was the average load graph.

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  • Windows 7 can ping but can't see device on other subnet

    - by user192702
    I have 2 Windows 7 on 2 different subnets but 1 of them is unable to reach a NAS. The topology is as follow. Any idea why this is the case? Is there some Windows settings I need to apply? Subnet 1 - PC 1 - NAS Subnet 2 - PC 2 PC 1 is able to do the following: - Load the admin page on the browser. - Show the NAS under Windows Explorer - Network. - Access the NAS when typed in \\ in Windows Explorer. PC 2 is unable to do any of the above 3. It can however ping the NAS and get a response.

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  • How I disable "Safely remove hardware" in Windows 8?

    - by DarkGhostHunter
    I have a Marvell 91XX and I just updated to Windows 8. The problem I have with the latest drivers 1.0.2.1027 is the absence of "Policies" tab inside the Properties in the Device Manager, where I could disable de "Safely Remove Hardware". It was in Windows 7, but in the new version is not, so the OS shows my two hard disks has removable hardware and I can't do anything about it. Is gone forever? Is in another part? Or is not supported? PD: The best I can come up for a fix is to roll back to Windows 7, see if the option changes some regedit value, export, update to Windows 8 and import.

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  • Dell Inspirion 1525 64bit driver compatibility

    - by Tony
    Hello, Can anyone tell me what the compatibility of drivers on 64bit vista are like on the Dell Inspiron 1525. Mine is just a year old now and I want to upgrade to 64bit vista. I wondered if there's known issues with drivers that I should be aware of before upgrading? Tony PS: is the upgrade worth it? My machine has 3GB of RAM and runs a T5800 2.0GHz DuoCore Processor. I use Visual Studio often and have loads of things open at the same time a lot. That's why I'm considering an upgrade.

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  • Windows Mobile deletes my Contacts when deleting a partnership

    - by bitbonk
    Sometimes when I reinstall my PC get a new Work PC or buy a new home PC ,ActiveSync, now the Device Center asks me to delete an existing partnership to setup a partnership with the new PC, since only two partnerships are allowed. When I delete that partnership all contacts that originally came from that partnership get deleted too. How can I prevent that from happening. Do I really always have to remember to frequently backup all my contacts in a safe place? How much redundancy is needed. I hat them on one of my PCs and on my phone.

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  • XP Install Driver Notification for AirCard

    - by Brian
    Hello, A co-worker of mine is using an air-card; it prompted him to install software in the notification tray; he clicked on the wrong thing and the icon went away without him installing that software. How can I get that icon back? He can't install the software then... I know that you can download the software from the site, but we did that and were having issues from that too, was hoping to be able to install the sofware on the air card... Restarting and trying again doesn't pop up the notification too. Thanks.

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  • SSH Interactive mode not working

    - by Ekin Koc
    I have a Debian based linux server running for a year or so, without any problems. A couple of days ago, ssh interactive mode stopped working for no reason. I mean, I can open an ssh connection just fine, the server greets me with shell but I just can't type anything. However, if I send commands like this: ssh [email protected] cat /var/log/messages, I get the response. I dug through several logs and found one message, which feels remotely relevant to the problem; sh kernel: [10222733.062511] ------------[ cut here ]------------ sh kernel: [10222733.062522] WARNING: at /build/buildd-linux-2.6_2.6.32-39-amd64-7yVIH2/linux-2.6-2.6.32/debian/build/source_amd64_none/drivers/char/tty_ldisc.c:738 tty_ldisc_reinit+0x46/0x7b() sh kernel: [10222733.062526] Hardware name: PowerEdge R210 II sh kernel: [10222733.062528] Modules linked in: ipt_MASQUERADE iptable_nat nf_nat nf_conntrack_ipv4 nf_conntrack nf_defrag_ipv4 ip_tables x_tables sha1_generic arc4 ecb ppp_mppe ppp_async crc_ccitt ppp_generic slhc loop snd_pcm snd_timer snd soundcore snd_page_alloc i2c_i801 i2c_core pcspkr evdev joydev dcdbas container button processor ext3 jbd mbcache sg sd_mod sr_mod crc_t10dif cdrom usb_storage usbhid hid mpt2sas ahci ehci_hcd libata scsi_transport_sas usbcore bnx2 nls_base scsi_mod fan thermal thermal_sys [last unloaded: scsi_wait_scan] sh kernel: [10222733.062568] Pid: 8662, comm: sshd Not tainted 2.6.32-5-amd64 #1 sh kernel: [10222733.062569] Call Trace: sh kernel: [10222733.062572] [<ffffffff811ff056>] ? tty_ldisc_reinit+0x46/0x7b sh kernel: [10222733.062574] [<ffffffff811ff056>] ? tty_ldisc_reinit+0x46/0x7b Is there any way to get back the sshd working in interactive mode? I tried restarting sshd but that is no help. And somehow, I can not reboot the server. Tried sending shutdown -r now and reboot but it refuses to go down. Should I go ahead and request a physical reboot?

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  • Windows PE 3.0 detect what device it was booted from

    - by Brian
    I am creating a custom boot disk for work using Windows PE 3.0. I need to be able to tell what drive the system was booted from. it may be a CD, or a USB Flash drive. In the past, I have looked for a file on the root of the drive that holds some of our custom configuration. however that is getting a bit messy. Basically, in addition to Windows PE, the drive or disk also has other scripts and tools. I need to remount that USB drive or DVD to the U:\ Drive, to keep thing consistent. Basically, Diskpart.exe Select Volume $X assign Letter=U Exit I just need to figure out how to determine that nasty little $X.

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