for questions concerning Ubuntu's kernel, including compiling and questions relating to modules

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0
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0answers
12 views

Black screen and call stack trace showing after kernel update

I ran an update today which included kernel updates. I left the screen for a while and when I came back all I see now is a black screen with white text containing call stack trace information ...
1
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1answer
68 views

Acer Aspire wifi on Broadcom b43 not working

ck, including userspace. [ 79.694480] [drm] Please file a _new_ bug report on bugs.freedesktop.org against DRI -> DRM/Intel [ 79.694486] [drm] drm/i915 developers can then reassign to the right ...
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4answers
8k views

How do I update my nvidia modules after updating my kernel?

Every time there's a kernel update, nvidia graphics drivers stops working because there's not a valid kernel module. What is the ubuntu way to 'recompile' the nvidia module for the new kernel? ...
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0answers
9 views

Unable to find my desktop after I boot with a lower kernel

Where is my desktop? My os is Ubuntu12.04.3 3.8.0-29-generic. I reboot the kernel with 3.2.0-23-generic.By sudo gedit /etc/default/grub change GRUB_DEFAULT=saved GRUB_TIMEOUT=2 ...
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0answers
14 views

Unable to install GCDemu in Trusty Tahr

After trying to install gcdemu from ppa I always get this error and im unable to install it I get this error (synaptic:6595): GLib-CRITICAL **: g_child_watch_add_full: assertion 'pid > 0' failed ...
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0answers
27 views

ubuntu doesn't boot with initrd.img-3.13.0-35-generic and initrd.img-3.13.0-36-generic

I'm not able to boot with initrd.img-3.13.0-35-generic and initrd.img-3.13.0-35-generic. I though that was something kernel related and it might be, but two kernels in a row I think it's to much. I ...
2
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0answers
56 views

How to disable Lazy Preempt in kernel

I'm relatively new to Linux and working on getting a real-time kernel up and running for robot applications. I'm on Ubuntu 14.04, using kernel 3.14.3 and the 3.14.3-rt5 real-time patch. Also using ...
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3answers
23k views

How do I clean or disable the memory cache?

After the system starts, in a few minutes my memory cache fills up and it starts using the swap. Here's a screenshot of /proc/meminfo. However, if I can disable this process / clean the cache once ...
3
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4answers
845 views

apt-get install was interrupted

I am new to Ubuntu. I got the following lines after an interrupted apt-get install. Running depmod. update-initramfs: deferring update (hook will be called later) Examining /etc/kernel/postinst.d. ...
63
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5answers
31k views

Why is swap being used even though I have plenty of free RAM?

I thought the whole essence of swap was to act as a temporary storage safety net when RAM was full but my swap partition is constantly being used even though I sometimes have as much as 3GB free RAM. ...
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1answer
85 views

Btrfs subvolume @home not mounted kernel upgrade 3.17

i'm having trouble upgrading my kernel to the latest 3.17 rc3 mainline kernel. I'm currently on a patched kernel 3.13 for my Acer chromebook c720p, the 3.17 kernel would give me support for touchpad ...
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0answers
15 views

How to build kernel with different flags?

Following the instructions here (https://wiki.ubuntu.com/KernelTeam/GitKernelBuild) I built a development version of the kernel. I copied the old config, called make oldconfig and then modified ...
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0answers
19 views

Gave up waiting for root device-edited grub and even tried reinstall

After I upgraded the Ubuntu kernel from 3.8.0-29 generic to 3.16.2 i tried to reboot and got dropped to the busy box shell with an initramfs prompt exactly like this Gave up waiting for root device. ...
3
votes
1answer
445 views

Kernel panic - json_object_array_length

So, I get kernel panic on boot now. It says /sbin/init: symbol lookup error: /sbin/init: undefined symbol: json_object_array_length Attempted to kill init blah blah I blame the json-c ...
4
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2answers
1k views

14.04 : How to disable discrete graphics card

I know 14.04 has Kernel 3.13 and is supposed to be better at dynamic power management. My problem is the estimated remaining time keeps changing. But on an average I see 5 hours. On same machine on ...
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0answers
20 views

How to recompile kernel in Ubuntu 14.04?

I wanted to recompile the kernel in my present working directory. I used the below command tar xjf /usr/src/linux-source-3.13.0.tar.bz2 as my current version is 3.13.0-32-generic, to unpack and ...
0
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1answer
26 views

Error while installing kernel from source

I get the following error when I try to compile kernel version 3.17.0-rc5: Error! Bad return status for module build on kernel: 3.17.0-rc5+ (x86_64) Why do I get this error and what does it mean? ...
2
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1answer
72 views

Ubuntu not loading - kernel panic

Installed Ubuntu on new laptop with Win8.1 installed from USB key. Worked fine and could dual boot. Installed updates and rebooted when instructed Got following message when booting into ubuntu: ...
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0answers
25 views

Search previous Kernels for specific driver since removed [on hold]

I have a Sony Handycam DCR-TRV460 which under 32bit Windows XP (alone) supports USB streaming. From what I have been able to determine, after exhaustively searching and Googling, is that there used to ...
0
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0answers
31 views

computer does not start

I'm using ubuntu 14.04.1 LTS and everything works fine from the day I installed it. Now when I am trying to start my computer, the screen is continuously stuck with so many messages like this: ...
0
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0answers
21 views

Ubuntu 14.04 Kernal Panic - kernel bug at /build/buildd/linux-3.13/kernel/timer.c:930!

This seems to happen intermittently, I can't seem to reproduce the it. It happens at least once a day for the last week or so. Quite frustrating! Screenshot I am unable to get a command line to take ...
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2answers
22 views

“'version' has bad syntax” error when attemping update-initramfs with -k version

I want to run the following command : sudo update-initramfs -u -k version , but i get the following error message update-initramfs: Generating /boot/initrd.img-version dpkg: warning: version ...
0
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0answers
7 views

When building kernel dbg package with ubuntu kernel repo, got this error “Can't read private key”

When building kernel dbg package with ubuntu kernel repo, got this error: make[1]: Leaving directory `/git/nsx-thirdparty/linux-3.14.17' # Add .gnu_debuglink sections to each stripped .ko # pointing ...
0
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1answer
141 views

lm-sensors ubuntu 14.04 core voltages

I am trying to measure the core voltages of my cpu. I installed the lm-sensors, I ran the sensors-detect and I reply YES to all of the question. At the end of the sensors-detect I get: To load ...
16
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6answers
40k views

Kernel Panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0)

Upon trying to upgrade from 10.10 to 11.04 all seemed to go well until the restart. This error message is what comes up: Kernel Panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0) ...
0
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2answers
47 views

Upgrade Ubuntu LTS to a Version that supports MacBook retina

I have Ubuntu LTS 14.04 with Gnome 3 as GUI installed on my MacBook ( it's a persent ) and some things don not work very well. Like Chromium is eye hurting small and my thunderbold interfaces do not ...
0
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1answer
37 views

Unable to install any ubuntu version on my old computer

I have Intel core2duo processor on a Intel G31PR motherboard, 1GB RAM a brand new WD 1 TeraByte hard disk. I am trying to install Ubuntu on my hard drive. But unfortunately, I am getting errors and ...
0
votes
1answer
26 views

How to get data from semi broken micro SDXC card?

I used to have a 64GB micro SDXC card in my mobile phone. But last week, after the phone crashed and I had to restart it hard, the SD card was not mounted anymore. The phone tried for 5 minutes but ...
0
votes
1answer
3k views

Installing Nvidia drivers with pkg1.run ends with “no Version.h found”

I have read a lot and tried a lot - nothing worked for me. I have a Dell Inspiron 8200 (1600x1200) with a Geforce MX440 Mobile. Installing the driver the "easy way" (sudo apt-get install ...
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2answers
9k views

“intel_rapl: no valid rapl domains” message upon boot

I install fresh Ubuntu 14. 04 server under ESXI 5.1.0. During my installation I did not get any erorrs or strange things. My problem is when I boot machine at console screen I get messages like [ ...
2
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1answer
2k views

How can I install 3.16 kernel on Ubuntu 14.04

sudo apt-get update && sudo apt-get dist-upgrade do not show the newest kernel. How can I install 3.16 kernel on 14.04?
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2answers
2k views

Do I need to add a boot parameter to work around this kernel power bug on a Sony Vaio VPC-EH1S0E?

If i with dmesg | grep -i aspm have this: [ 0.503709] ACPI FADT declares the system doesn't support PCIe ASPM, so disable it [ 0.673564] ACPI _OSC control for PCIe not granted, disabling ...
1
vote
1answer
3k views

Why does it take over a minute for the desktop to load after logging in?

After entering the login-password, it takes more than a minute before the desktop is shown. The output of dmesg: [ 2030.004228] audit_printk_skb: 156 callbacks suppressed [ 2030.004231] type=1400 ...
0
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1answer
14 views

kernel / initd boot settings

I have 2 seperate harddrives in my pc, one with windows 7 (working) and one with ubuntu. I am unable to boot into ubuntu for some reason :/ I installed easyBCD to correct the windows bootmenu and used ...
2
votes
2answers
77 views

List all kernel settings to get details about installed devices

How can I find out with which settings my kernel was compiled? I would like to understand the concept behind this. I wonder how I can find out which device uses which module. For example: right now, ...
5
votes
1answer
133 views

How to install 'cdfs' kernel module?

I am unable copy files from 'mpegav' within video CDs in my Ubuntu 14.04. After a extended search now I understand I need to mount the cd using 'cdfs': sudo mount -t cdfs -o ro /dev/sr0 ...
0
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0answers
20 views

Some USB ports aren't enabled

I am using Ubuntu 14.04. My computer has an AMD FX-8350 Vishera 4.0 GHz Octal-Core AM3+ processor. My computer has 8 USB ports, but only two of them are active. The processor in the boot enables all ...
0
votes
1answer
28 views

Ubuntu Server compiling kernel modules

I am trying to compile paragon ntfs driver http://www.paragon-software.com/home/ntfs-linux-per/screenshots.html and got “no symbol version for module_layout" error when modprobe loading modules. ...
3
votes
3answers
2k views

/usr/src is eating up all inodes

It seems /usr/src (apparently old kernels) used up all my inodes: Filesystem Inodes IUsed IFree IUse% Mounted on /dev/sda4 489600 489600 0 100% / devtmpfs ...
0
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2answers
45 views

Unable to download the source code of linux that I am running

On my machine: root@zaidi:/home/uzair# uname -r 3.13.0-35-generic Also: root@zaidi:/usr/src# ls linux-headers-3.11.0-15 linux-headers-3.11.0-23-generic linux-headers-3.11.0-15-generic ...
0
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0answers
25 views

Reporting a subtle bug in Ubuntu 14.04 kernel

Note: I have filed this bug on Launchpad and can be seen at https://bugs.launchpad.net/ubuntu/+bug/1369374. I am reporting it here as well hoping to find a workaround. I have reasonably good ...
1
vote
1answer
673 views

“Your current Hardware Enablement Stack (HWE) is going out of support”

My ubuntu system now says; Your current Hardware Enablement Stack (HWE) is going out of support on 07. aug. 2014. After this date security updates for critical parts (kernel and graphics ...
4
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2answers
11k views

AMD Catalyst Driver installer failing at DKMS

I am following these instructions to install the fglrx drivers. When I am running sudo sh amd-driver-12-6-x86_64.run it tells me fglrx is already installed; even though I ran the commands to remove ...
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3answers
154 views

Intel Corporation 7 Series/C210 Series isn't being detected by any module

I have the same problem that the user in "Dummy Output in Ubuntu 14.04". The difference is that cat /proc/asound/card0/codec* | grep Codec outputs: cat: /proc/asound/card0/codec*: No existe el ...
5
votes
1answer
4k views

How to reinstall newest Linux Kernel?

Hello I upgraded all packages on my Ubuntu, and kernel also. But in upgrading process kernel upgrade failed, and I must always after grub load select older kernel. It is a terminal command to ...
1
vote
1answer
3k views

With Kernel 3.5.0-21 the wireless card Realtek RTL8723AE-BT stop working

Yesterday, I updated my Ubuntu 12.04 to the Kernel 3.5.0-21 and the wireless card stop working... In other threads I saw the same problem with another kernels. Anyone have the new driver? I sent a ...
4
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3answers
5k views

How can I temporarily disable ASLR (Address space layout randomization)?

I am using Ubuntu 12.04 32-bits now for some experiment I need to disable ASLR how can I do this? and after that what should I do to enable ASLR again?
1
vote
1answer
194 views

None of the peripherals(eth, USB ) working after upgrading to kernel version 3.8.5 in Ubuntu 12.04 LTS

I have been using Ubuntu from a long time but I had never been in the depth of Ubuntu. At present I am using Ubuntu 12.04 LTS. It was getting hanged randomly and fast when I was using Firefox. I ...
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0answers
24 views

1.5GB RAM with Pentium 4 for Ubuntu 14.04 LTS [duplicate]

I have an old desktop with 1.5GB RAM and Pentium 4? Would Ubuntu 14.04 work fine or i need to downgrade to xubuntu or lubuntu? It would be fine per the hardware requirements specs for 14.04 but was ...
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3answers
3k views

Ubuntu 13.04 installation issues: unable to handle kernel paging request error

I wish I could say that I’ve done more for the Linux community as of recent but I am very VERY new to all of this and I feel very much in over my head. I figured I would install Ubuntu. on my computer ...