Linux refers to the family of Unix-like computer operating systems using the Linux kernel. If your question is about a certain distribution only, use a more specific tag.

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How do I make my Lenovo Y50's subwoofer work on linux?

I have a Lenovo Y50 laptop which has a subwoofer integrated that works on Linux Mint 17.2, only if I download HDA Analyzer and change with it: PIN 0x17 -> Widget Control -> Check OUT and Uncheck ...
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91 views

Rebuilding FakeRAID RAID 5 with new disk, no partitions show up, invalid PMBR

I have a RAID 5 array with 4 2TB disks on a HP Z800. One disk failed and was swapped out for a new one. I went into BIOS Intel Storage Matrix Utility and set the Array to rebuild with the new disk. ...
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5k views

Perf samples too long, lowering kernel.perf_event_max_sample rate to

My machine freezes from time to time and I can get it working back by pressing the space key. I have this problem since two weeks now, but it was just once per day max. Now it's starting to be many ...
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1k views

QEMU within VirtualBox and bridged connections all the way down

I'm trying to get an ARM QEMU system out on my LAN. I tried running QEMU directly from Windows (Windows 7 x64), with success except I could not get a TAP adapter to bridge to my wireless connection. ...
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1k views

Multiple GPUs in Linux - how to specify which GPU runs X windows

I have been running Red Hat Enterprise Linux 6.1 on a system with a GTX 480. Recently I added a 3GB GTX 580, as my CUDA application requires more memory than I have on the 480. Due to space issues in ...
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253 views

Kali Linux's NVIDIA driver install guide does not work

I'm trying to get my natively installed Kali Linux distro to detect my second monitor. I have two Samsung S20B300 monitors but its only picking up one of them. The one it is picking up is plugged in ...
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300 views

switch off anti aliasing in fedora 22

I updated to fedora 22 last days and under most desktops ( kde/gnome/gnome3 ) all terminals have a very very ugly font setting. It is nearly impossible to use some text base editors in this terminals ...
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94 views

why am I not seeing traffic using TCPDUMP while sniffing on wireless interface with the station in WDS mode

I've 2 wireless interfaces one has the type of AP and the other has the type monitor. the AP is attached to a bridge br-lan. When I run for example: tcpdump port 5201 -s 0 -ni wlan0 TCPdump is ...
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390 views

How to configure linux to enforce new users to change their password on first login

I'm trying to configure users password policy on RHEL 6.6 and I want system to ask newly created users to change initial password on first login. Note, that I tried to set EXPIRE variable to 0 and ...
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172 views

How can I stop my laptop waking from suspend as the lid is closed?

I have an Alienware M17x with Kubuntu 14.10. When I suspend to RAM and close the lid, very often it will wake up after a few seconds of sleep. Sometimes not. I get the feeling it's related to how ...
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475 views

Error whilst initializing SD card on Linux

I have noticed troubles with my microSD card in my Android phone and when I tried to insert it into my Linux laptop, I get the following error in dmesg: [ 247.588279] mmc0: error -123 whilst ...
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114 views

What Exactly am I Seeing Here?

I have a Dell D620 that has its screen ripped out ( was damaged a while ago ) and so to see any console output, I have a VGA-Compatible TV hooked up to it. Sometimes when I haven't typed anything for ...
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47 views

Swap alt and ctrl in certain programs on Linux

I would like to swap alt and ctrl key when launching certain programs on Linux, such as zsh and emacs, while keep the original keyboard layout when using other programs. Is it possible to do so? ...
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279 views

Webcam is only recognized by some software

I have a webcam that works fine in software such as camorama and cheese. However, I cannot use it in websites that allow you to use a webcam (it's not recognized). I tested it with: Chromium 34.0 ...
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339 views

Block all outgoing traffic for a User running Wine apps

Good day, I'm using a lot of WINE apps under Linux which work just fine, but one thing I am specifically looking for right now is to block their access to the internet (outgoing), with exception of ...
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464 views

VirtualBox Port Forward not working when Guest IP *IS* specified (while doc says opposite)

Trying to port forward from host (Mac OS X) 127.0.0.1:8282 -> guest (CentOS)'s 10.10.10.10:8080. Existing port forwards include 127.0.0.1:8181 and 9191 to guest without any IP specified (so whatever ...
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1k views

Apache2 + Php + Pthreads HowTos

I'm running Ubuntu 14.04 LTS 64 bit. What I would really love to do is sudo apt-get install libapache2-mod-php5 but compile PHP with --enable-maintainer-zts so I could later install pthreads with pecl ...
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220 views

mdadm: Win7-install created a boot partition on one of my RAID6 drives. How to rebuild?

My problem happened when I attempted to install Windows 7 on it's own SSD. The Linux OS I used which has knowledge of the software RAID system is on a SSD that I disconnected prior to the install. ...
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159 views

Iptables error :libipt_cgroup.so doesn't exist while using net_cls.classid in net_cls cgroup subsystem

In kernel document doc/cgroup/net_cls.txt, it introduces the function of net_cls.classid, and show an example of netfilter (iptables) using this tag to perform actions. the command of iptables is: ...
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416 views

I can't get XFCE terminal to display VIM's colorschemes

That's what I have in my .bashrc if [ -n "$DISPLAY" -a "$TERM" == "xterm" ]; then export TERM=xterm-256color fi In my .vimrc I have: set t_Co=256 echo $TERM prints xterm-256color tput ...
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97 views

DNS tunneling through an SSH connection looses connectivity

In the article 'UDP traffic through SSH tunnel', it is described how to tunnel DNS trough a SSH tunnel: client# ssh -N -L 6667:localhost:6667 user@server server# mkfifo /tmp/fifo server# nc -k -l ...
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508 views

Stuck at GRUB prompt after booting, how can I restore normal booting?

My machine was dual-booting with Windows XP and Fedora, then I tried to install Arch. While installation power went off. After that, booting always results in the GRUB prompt. Even when I instruct my ...
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139 views

Short hang on each new window and each closed window in Linux / Gnome Shell

Every time I open a new window on screen, the entire display freezes for 3 seconds. Every time a window is closed, the entire display freezes for 3 seconds. The first few windows after reboot are ...
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908 views

Is it possible to run Corona SDK on ReactOS or Wine?

I dumped Windows, I'm now using Xubuntu. Is it possible to run Corona SDK on Wine? On Corona forums, they say no, but I wounder how this guy did it? Is ZeroBrane a solution? What about ReactOS (or ...
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244 views

xkb set keyboard level 3 chooser to ctrl+alt

The title says it all: I'm interested to mimic the Windows behavior, where Left Ctrl + Left Alt acts as a 3rd level chooser. This is relatively important to me, because, as a programmer, on my ...
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205 views

How to disable / re-map keyboard keys in the kernel?

I would like to remap my Caps Lock key to either nothing or a key code of my choice. To get the same behaviour across different environments (X / Wayland / non-graphical TTYs), and for learning how ...
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210 views

Need noacpi in CentOS 6.4, not in RHEL 6.4

I've been trying to fix a rather odd problem that I've seen on our new Dell R5500 (Xeon based workstations). We want to run CentOS 6.4 64 bit on them. We did a base install which worked fine, however ...
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689 views

What is causing this post-commit error “database is locked” when I perform SVN commits?

I have a Ubuntu machine acting as a subversion server via an svnserve daemon (as root) in my private network. The svnserve daemon reads from a mounted SMB share that is on our raid setup. I can ...
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850 views

redshift color adjustment with hardware/software cursor

I'm running Arch Linux (with Con Kolivas' ck1 patchset, although that shouldn't affect this issue) and using the proprietary Nvidia graphics driver, currently at version 313.26 (my card is a GeForce ...
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626 views

Dropbox causes xorg to use 100% CPU

For some time, I noticed that my xorg process uses up between 60 and 100% of the CPU (according to top). I also noticed that interactive work becomes sluggish, even on my multi-core i7 processor. ...
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2k views

No DisplayPort output via DisplayPort→HDMI adapter from Nvidia card using Linux on Thinkpad W520

I have a Thinkpad W520 laptop with Nvidia Quadro 1000M graphics running Debian testing (“wheezy”) and Nvidia driver version 295.40-1. The graphics mode is set to discrete in the BIOS. I would like to ...
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3k views

XRDP: window manager not starting

I have setup my Ubuntu server so that I can connect and login to XRDP from Windows remote desktop. My problem is that after logging in, no window-manager is started. It only displays a single ...
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3k views

Why boot fails with bios SATA Mode as AHCI?

In a nutshell, I am trying to figure out for some Jetway engineers and myself, why the custom bios they made me does not allow SATA devices to boot in AHCI mode. Obviously, this is difficult to ask ...
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448 views

Ubuntu linux - new “MIDI” device diagnostic software?

I'm looking for software that will tell me if a particular USB device meets the MIDI standard. I have a new Madcatz wireless USB controller, that I suspect will need a special driver before it's ...
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644 views

Case-sensitive error in compiler's building using crosstool-ng under Cygwin

When I try to build gcc cross-compiler using crosstool-ng under Cygwin (running in Windows 7) I have the following message: $ /opt/ng-crosstool/bin/ct-ng build [INFO ] Performing some trivial sanity ...
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560 views

Gnome 3 move window to 2nd monitor?

I am running Mint Linux 12 with Gnome 3. My setup has 2 screen. I am wondering if there is a program to move the windows to a 2nd monitor? Something like display fusion for Linux that makes a button ...
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56 views

Beaglebone DHCP Server Assigns its Own IP Address

I'm trying to run a DHCP server on my Beaglebone Black (running Debian), and I want to give it a static IP address - 192.168.17.1 - but it keeps assigning itself its own different IP address - ...
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61 views

Password-protected PDF not opening on Linux

I have a PDF document (from the British Library via interlibrary loan) which is password protected via some sort of remote validation of the password. I tried to open it on Ubuntu 14.04, which ...
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43 views

Configure firewalld to distinguish home and public ethernet connection

I connect my notebook via ethernet at home and outside. I want to open some ports for services like samba only at home and not somewhere else. How can i let firewalld automatically detect where i am, ...
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92 views

Treat USB Keyboard as Gamepad

I have a second USB keyboard I'd like my computer to recognize as a gamepad rather than just an extra keyboard. Is this possible on Ubuntu 14.04? I've seen information on doing the opposite, treating ...
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120 views

Linux access to Windows 7 dynamic volumes (striped or mirrored)

I'm considering setting up a dual-boot system for the first time for many years. My plan for the system is to set it up as follows: SSD for both system partitions 2 identical hard disks, split ...
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47 views

Configure three screens backed by two graphic chips in a laptop under Linux

I'd like to connect two external monitors (one via HDMI, one via VGA) to my HP ProBook 4330s LW813EA laptop, while keeping the laptop screen on as well. The Intel HD 3000 graphics embedded in Core ...
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312 views

OpenVPN, L2TP, or PPTP client that is a SOCKS5 server | linux

I need an OpenVPN, L2TP, or PPTP client for Linux - don't care which - that acts as a SOCKS5 server on the local machine. It should not set up tunnel interfaces or anything like that, it should just ...
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359 views

How to use DVD+RW (UDF) both in windows and linux?

I have dvd+rw disk. I would like to create UDF file system on it to use with windows 7 (and newer) and gentoo both. How must I prepare media and what commands should use to mount it in linux? What I ...
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495 views

LSI SAS 2308 MPT2SAS Linux Read/Write performance

LSI SAS 2308-8e (6Gb/s per Lane) PCIe 3.0 card. Average Read/Write Raw performance for 4 SSDs is very low around 430 MB/s (Expected 2 GB/s).I am having Intel Core i3 with quad cores and 4 GB RAM. ...
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109 views

scp doesn't work when my .bashrc is echoing to console

Ok, so I have used linux for a long time but this is the weirdest thing I have encountered in a long time. Maybe I just don't do a lot of scp so probably missing something simple here. So in my ...
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341 views

Debian 7 kernel 3.13.6 - kworker freezes for no reason and takes several processes with it

I have been wracking my brain trying to figure this out. My Linux server will, at random, decide to just hang everything and it is only ONE kworker thread that does it. First the kworker thread ...
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363 views

Poor write performance on ecryptfs

I did a bit of benchmarking with ecryptfs and dm-crypt, and got some interesting results. All the following were done with a Btrfs filesystem, using dd to copy a ~700MB file to/from a ramdisk with the ...
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133 views

Migrate LVM to ZFS

I am currently thinking about moving away from my LVM setup to a ZFS setup with RAIDZ. My current setup consists of 5 x 4TB disks in a LVM and a 60GB SSD for the system. At the moment there is about ...
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309 views

How to decrypt a message sent via Pidgin-Encryption?

A friend sent me an offline Google Talk message that was encrypted via Pidgin-Encryption. It didn't appear in my Pidgin logs because I wasn't logged in when it was sent, but I do have the encrypted ...