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  • USB 3.0 controller is not recognized

    - by BlueWanderer
    I have a Thinkpad E430 notebook, and the intel's USB 3.0 controller can not be recognized by Ubuntu 12.04. The LED on my USB-HDD is white instead of blue (And in Windows 7, it is blue when connected to USB 3.0 port, and is white when connected to 2.0). And the transfer speed is around 25MB/s instead of 65MB/s in Windows 7. I'm not familiar with Linux systems, so I've no clue about what's going wrong. I've searched the web, but got no solution.

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  • Turning on and off HP Probook 4530S touchpad

    - by ScienceSE
    I installed Ubuntu 11.10 on my HP laptop and among some problems, one of which I'm trying to solve is the touchpad problem. It's working, but how can I turn on/off it? In SUSE Linux Enterprise Desktop (which was preinstalled) and Windows, the touchpad is enabled/disabled by touching the left upper corner, when small diode is situated. In Ubuntu, I touched that area many times, but nothing happened. Do anybody know how to solve the problem?

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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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  • 12.04 Booting into Terminal

    - by user170796
    To preface this, I would like to say that I am completely new to Ubuntu and have essentially zero programming experience/experience working with command line and terminal. I installed Ubuntu because I would like to get into programming. If you could provide me with the simplest instructions possible, I would be grateful. I have a Lenovo Ideapad Y500 (Intel i7, NVidia GT 750m, 1TB HDD, 16GB SSD cache, 8GB RAM) with Windows 8 on it. Using a Live CD, I installed Ubuntu 12.04 onto a 75 GB partition. During the installation, I kept all default settings except for one thing; I decided to encrypt my home folder, and so checked the corresponding box. The installation completed, and I restarted. Once I restarted, I saw the options "Ubuntu, with Linux 3.2.0-23-generic" "Ubuntu, with Linux 3.2.0-23-generic (recovery mode)" "Memory test (memtest86+)" "Memory test (memtest86+, serial console 115200)" "Windows Recovery Environment (loader) (on /dev/sdb3)" "Windows 8 (loader) (on /dev/sdb5)" "System Setup" I chose the first option, and was directed to a screen with the Ubuntu logo and the row of five dots below that change from orange to white. Then, I was brought to a full screen terminal that prompted me to login, which I did. I saw no option to boot into GUI at all, and am lost. I've been searching around and have tried the "startx" command to no avail. Should the command have some sort of context or something? I've also tried selecting the recovery mode option from the boot manager. I've tried the resume option from the following menu, which eventually just shuts down the computer after displaying a lot of scrolling text that's too fast for me to read. I've also tried the failsafex mode from the recovery mode menu, which only brings up a terminal box at the bottom of the window that covers the entire bottom part of the screen. Commands won't work in this window. When I try to access Windows 8, I get a message saying that the EFI file path was not specified or something along those lines. I had to enable Secure Boot in order to access Windows 8 (I had disabled it to be able to boot from the Live CD), which is functioning normally. I am at a complete loss for what to do. Any help will be extremely appreciated. EDIT: Bonus question! If you could figure out a way for me to boot to Windows 8 without having to enable Secure Boot, it would save me a lot of trouble. I can deal with switching every time, but I'd rather not have to.

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  • IBM and the labors of TurboHercules

    <b>LWN.net:</b> "One need not agree with IBM's position to understand it. IBM understands well the power of commoditizing its competitors' proprietary technology - that's what its support for Linux is all about, in the end."

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  • Firefox 3.6.13 est disponible et propose de petites améliorations en sécurité et stabilité

    Firefox 3.6.13 est disponible, et propose de petites améliorations en sécurité et stabilité Mise à jour du 10.12.2010 par Katleen Mozilla propose désormais la version 3.6.13 de Firefox. Il s'agit d'une mise à jour mineure, qui patch juste quelques problèmes de sécurité tout en améliorant la stabilité du navigateur. L'update peut se faire directement via la fonction de mise à jour automatisée du logiciel , ou bien en téléchargeant la version 3.6.13 pour Windows, Mac ou Linux. Les vulnérabilités corrigées sont : Citation:

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  • Deux nouvelles colorations syntaxique et quelques améliorations apportées à la balise CODE, pour plus de confort sur les forums de Developpez.com

    Deux nouvelles colorations syntaxique et quelques améliorations apportées à la balise CODE pour plus de confort sur les forums de Developpez.com Chers amis, J'ai le plaisir de vous informer que la balise Code a été encore une fois améliorée ! Ajout de deux nouvelles colorations : - Bash (en vigueur sur les forums Linux par défaut) - Assembleur (en vigueur sur les forums Assembleur par défaut) Code bash : Sélectionner tout - ...

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  • Problem with partitions and 12.04

    - by Wejq
    Can I have some help? I tried to install Ubuntu 12.04 on my laptop, that has some partitions: 2 ntfs (one of them is restricted by the system) 2 ext4s 1 Linux swap But when I insert my CD, and run liveCD (as I am now), the installer can't see any of my partitions, it can see only /dev/sda as unallocated place, so does gparted (Fdisk seems ok). On these partitions I have data, that I can use by windows on NTFS's. Here is some of this data:

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  • SFML 2.1 est disponible au téléchargement, la bibliothèque graphique corrige de nombreux bogues

    SFML 2.1 est disponible au téléchargementQuelques mois après la tant attendue version 2.0, la SFML, revient dans une mise à jour mineure corrigeant de nombreux bogues :SFML-Window correction d'un bogue faisant que les événements de déplacement de souris n'étaient pas toujours générés lorsque le bouton gauche était maintenu sur Windows ; les paramètres de contexte étaient ignorés sous Linux lors de la création de la fenêtre ; correction du bogue qui faisait que la fenêtre n'apparaissait pas ...

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  • Hassle-free Backup with Deja Dup

    <b>Linux Pro Magazine:</b> "The Dé Dup backup utility may not be the most powerful or flexible backup tool out there, but it does have its advantages. Its straightforward interface makes it dead-easy to configure backups, while the support for the Amazon S3 storage back-end is a boon for users looking for unlimited backup storage on the cheap."

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  • How can I make my primary partition larger?

    - by Hjke123
    Well i'm running 2 different distro's of linux right now and I decided to make my ubuntu partition my primary partition larger so I took 119.53 GiB out of my other distro's partition and it became unallocated and then I figured Gparted would when I right click on it to resize/move give me the option of using it to make another partition bigger but it did not so I went google searching online and in one post I saw it said you had to format the unallocated space so I formatted it to ext4 the same as my primary partition but still no options to add it to any thing what do I do?

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  • execute a shell script when USB is connected

    - by Null pointer
    I am working on an application which deals with all kinds of USB storage devices(such as taking backup, updating DataLogFile etc) My problem is : I want to write a shell script which is stored in this USB drive(As usb is at center of my project so USB is going to be same but PC's will change) AND this script should be executed as soon as the USB drive is connected to my Linux system.I will not need any kind of "root" or "sudo" permissions for other tasks which I am going to do in this shell script.

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  • Beef up Firefox Privacy Features

    <b>Linux Magazine: </b>"Whether you want it or not, your Web activities are tracked and analyzed in many different ways. There are a few handy Firefox extensions that can beef up your favorite browser's privacy features."

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  • Hardware problem

    - by Ajay0990
    Guys I need help to recover my external hard disk. Im using SEGATE FREEAGENT GO 320gb HDD. Recently I tried to format it using command line in win7, but accidentally I removed the hdd before the format is complete and I cannot open it and I tried to recover data using as many software's as I can but no use I have max of 25000 bad sectors. Can i still recover my hdd? Is there any way to recover my HDD with max bad sectors using Linux?

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  • AMD Drivers problem

    - by Darthkpo
    So, I'm kind of new to Ubuntu and Linux in general, I installed the latest (Ubuntu 14.04) and everything went fine, except for the resolution so I thought that it was a driver problem because I have a AMD HD 7750 and maybe it required additional proprietary drivers so I installed AMD Catalyst (Latest version), and then rebooted. And now my monitor says Can't Display and I can't see the GUI. I can go to terminal (Pressing Ctrl + Alt + F1, F2, F3 etc) but Not the UI.

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  • iptables rules for desktop computers

    <b>503 Service Unavailable:</b> "Today I will show you the iptables rules I set on my main personal computer, with detailed comments about why I came to use these rules after several years of Linux desktop usage."

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