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

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4
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2answers
2k views

kernel version 3.13 even I have ubuntu 14.04.2

I am using 14.04.2 probably it was upgraded over 14.04.1 but my kernel version seems still 3.13. According to 14.04.2 it seems that 3.16. I did not understand why it was not upgraded ...
0
votes
1answer
15 views

How to avoid manually reinstalling zfs after kernel update

I use ZFS and everytime the kernel is updated, ZFS is broken and the mounts are missing. I always have to follow this procedure, that I found on the net ...
37
votes
1answer
27k views

Is “laptop-mode-tools” still relevant for 12.04 and the 3.x kernels?

I'm using Ubuntu 12.04 x64 and trying to choose power management software. Laptop-mode-tools have a lot of features, but the only reason why I'm worry about is that it's manual and config files are ...
1
vote
3answers
4k views

Ubuntu 13.10, kernel 3.11 blank screen issue with hybrid graphics

On my HP Envy, which has both an Intel on-chip graphics card and an Nvidia Geforce: *-display UNCLAIMED description: 3D controller product: GK208M [GeForce GT 740M] vendor: NVIDIA ...
0
votes
0answers
6 views

Intel Graphics HD 3000 Steam Problem

I'm having issues with my grapics, when i play on windows CS GO for example i can play it smoothly, but on ubuntu (14.04 ,14.10 and 15.04) and now im on ubuntustudio 15.04; i have FPS drops on a ...
0
votes
1answer
46 views

Is it safe to install linux kernel 4.1.6 on Ubuntu 14.04

I want to use latest stable Linux kernel on Ubuntu 14.04. But I`m wondering about some compatibility issues. If I install new kernel what happens ? Is it dangerous ?
0
votes
2answers
9 views

Loop module not present on Ubuntu installation

sudo modprobe loop max_loop=255 does not return an error, but lsmod | grep "loop" returns nothing. Likewise find /lib/modules/$(uname -r) -name "loop.ko" doesn't print any paths to the screen. I'd ...
1
vote
2answers
242 views

modprobe of nvidia driver for GPU not loading at boot

Problem is exactly as described in the title. Here is my system details: OS: Ubuntu 14.04 Card: GTX 980M Driver: 3.43 My GPU computations with caffe don't work right on boot, it requires a sudo ...
1
vote
0answers
19 views

Full downgrade from 14.04.3 lts-vivid stack to standard 14.04 lts stack

the issue is well represented by the title. How can I completely revert the 14.04.3 lts-vivid stack (3.19 kernel + updated graphics stack) to the standard 14.04.0/1 trusty stack? I know that the most ...
1
vote
1answer
4k 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 ...
0
votes
0answers
12 views

Stuck with loading boot… Booting

I bought a Dell inspiron with Ubuntu... But it never works. I was stuck with guest session only. So I try to boot Ubuntu I was blocked by a "0.292496] - end trace f1953578386cb33c] ---- kernel panic ...
0
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0answers
10 views

kenel compilation kgdb via virtual box

I need the link from where i can get guest OS of linux 14.04 for installing it in virtual box 5.0. I am trying kgdb on virtual box
9
votes
1answer
9k views

zram vs zswap vs zcache Ultimate guide: when to use which one

What the hell are they? how are they different (I've written my understanding in an answer below) In the Zswap system, when a page is evicted from the zswap to the actual swap is it stored in a ...
0
votes
0answers
9 views

Newly installed system won't boot, how to disable k10temp from GRUB2?

I just installed Ubuntu GNOME (via the minimal install, as no other Live CDs would boot) on a desktop computer which has an AMD Triple-code Phenom 8450 processor. The issue is, that after one reboot ...
0
votes
0answers
8 views

NUC 5CPYH + Intel 3165 + Ubuntu 15.04 or 14.04. Here's how.

This page describes how to get the Intel 3165 wireless card working on Ubuntu 15.04 on the Intel NUC 5CPYH. To fix this problem: Check the linux kernel you are using $ uname -r Even if you've ...
0
votes
1answer
18 views

VMWare Player - Failed to build vmnet. Failed to execute the build Command

Failed to install VMware player in my Ubuntu 14.04 OS installed on an external hard drive. The steps i m taking are below (Tried these steps 4 times, restart my OS but nothing works) sudo apt-get ...
2
votes
1answer
4k views

Fastest way to reload graphics driver module?

I am trying to get my way around on graphics driver development, in this case for modifications on a DRM kernel module, called gma500_gfx. Every time when I have made a change to this driver, I start ...
0
votes
0answers
65 views

Kernel 3.13.0-61 Update Won't Boot

I have an Acer Aspire V-7 running Ubuntu 14.04. Updating to Kernel 3.13.0-61 it no longer boots. I just get a black screen with a dash and nothing happens. Same thing with 3.13.0-62. The last working ...
1
vote
2answers
173 views

MPTCP installation and configuration on Ubuntu 14.04.2 LTS

I'm trying to install MPTCP (Multipath TCP) on my Ubuntu but I have a problem : I follow instructions under this link : http://multipath-tcp.org/pmwiki.php/Users/AptRepository I have no problem on ...
4
votes
2answers
259 views

Dell XPS 13 (2015) Black Screen

UPDATING: I followed every step of this guide but still getting the black screen with the system alive and can't go to tty1-6. So now I'm on Ubuntu 15.04 (kernel: 4.1.3-040103-generic). I found this ...
0
votes
0answers
13 views

Getting grub to detect ubuntu installation

I realize there are probably many questions about this topic already, however, I can't find a solution for my specific problem. I have an ubuntu gnome installation which I don't want to reinstall, ...
0
votes
0answers
8 views

Deleted Kernals, tried to update, can't do anything with full boot directory

I tried to run a backlog of updates for my ubuntu computer (lenovo T420 if that's relevant) and received a "your boot is full" message. I've had this before and decided to remove some kernals. The ...
0
votes
0answers
14 views

Trouble installing Ubuntu on a Gigabyte motherboard

So I've been reading around here about similar problems to mine but nothing helps. mainly because every one is having problems after the 15.04 update from 14.04 or 14.10. my problem isn't with ...
0
votes
1answer
99 views

My cpu slows down after a while and does not recover

Sometimes, and I can't reproduce it (but it happens often enough - a few times a week at least) my cpu slows down below its prescribed minimum. This is an example cpufreq-info output from a minute ...
3
votes
2answers
2k views

14.04 Dpkg Found kernel: /memtest86+.bin issue

Hopefully I'm not violating any rules by opening new topic for the issue I've encountered. Trust me, I've tried browsing all over askubuntu and bunch of other sites, but none of offered solutions have ...
9
votes
1answer
1k views

Does Ubuntu automatically release memory allocated by a C program as the program terminates?

I have written a C program containing code allocating memory using the malloc() function. If I don't free up the memory using the free() function, will Ubuntu release it automatically?
2
votes
1answer
920 views

Why the kernel doesn't update automatically?

I have two servers running 12.04 LTS. #1 has upgraded to kernel 3.2.0-57. #2 is stuck on 3.2.0-34. #2 is getting all other package upgrades. BUT, the kernel is never upgraded. This is what I have ...
1
vote
1answer
59 views

problem with kernel

In the past I had tried to update the Ubuntu kernel with that found on http://www.kernel.org/. Due to some problems I had to revert the changes as my kernel image didn't boot well. Since then I get ...
0
votes
1answer
66 views

Is it possible to upgrade kernel of 14.04 LTS to v4.1.6(stable release)?

I am using ubuntu 14.04 (32-bit, 2GB RAM) and kernel is v3.18.3-031803-generic. Is it possible to upgrade the kernel version to latest kernel v4.1.6 without any issues?
0
votes
0answers
38 views

Kali Linux 2.0 Wireless Adapter [on hold]

I have been having difficulty trying to get my wireless adapter to work with the new Kali Liunx 2.0. I have a Edimax EW-7822UAC wireless USB adapter. Everytime I download the driver on the Edimax ...
1
vote
1answer
5k views

hostapd Failed to update rate sets in kernel module

I'm getting this error launching hostapd with minimal conf Failed to update rate sets in kernel module I've just installed Ubuntu-GNOME 13.04. When I was using Ubuntu 12.04 did not receive this ...
3
votes
1answer
632 views

“Wrong ufstype may corrupt your filesystem” - Should I be worried?

I was just now looking through /var/log/syslog and I found these line which worried me: ufs: You didn't specify the type of your ufs filesystem May 5 09:06:09 Bath-Towel kernel: [ 425.626221] May ...
0
votes
2answers
25 views

Recommended branch

I am on 14.04 and I was trying to solve my weak wireless connection (download 1Mbs vs 30 Mbs wired) problem using this tread. http://ubuntuforums.org/showthread.php?t=2219952 by doing the following ...
3
votes
2answers
4k views

Why do I get disk I/O errors booting the 3.2 kernel on a xen vps server?

I have a xen vps, which I just upgraded to the new LTS 12 Precise Pangolin. However, I see this error on booting: [ 12.848076] end_request: I/O error, dev xvda, sector 12841 [ 12.848093] ...
0
votes
0answers
14 views

Could not find kernel image kernal isoliunix/isoliunix.cfg

Since last 5 hours i get tired when i trying to install ubuntu through my flash memory and finally i surrender i trying all the solution in the google but nothing work i download Ubuntu 14.04.3 LTS ...
1
vote
0answers
15 views

unable to update to the latest kernel

I had troubles with kernels and asked a question on how to remove them Can I delete my most recent kernels With the help I received I did manage to delete the offending kernels. After that I ...
-1
votes
0answers
19 views

Exception in thread “main” org.hibernate.MappingException: Unknown entity: com.hibernate.user [on hold]

What seems to be the problem here? While trying to run my hibernate project in Eclipse on Fedora ? I have even added: <!-- mapping file --> <mapping class="com.hibernate.user" /> ...
5
votes
2answers
6k 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 ...
1
vote
1answer
363 views

Right way to completely clean up old kernels in terminal

I have been going through various questions about how to clean up old Linux kernels. They all seem to have different answers and they are old, so someone is bound to say the question is too old and ...
0
votes
1answer
20 views

Upgrade from development branch to alpha release [closed]

I am currently on Xubuntu 15.10. The kernel details are: Linux goelpc 3.19.0-22-generic x86_64 GNU/Linux I want to upgrade to the latest alpha build. How can I do it from the command line? Running ...
1
vote
0answers
19 views

Which of these hardware devices are not listed in the /dev directory?

(1) Mouse (2) Video adapter (3) Network adapter (4) Webcam (5) Hard drive (6) USB drive I feel like all of them is listed except for the network adapter , Is that correct ?
0
votes
0answers
9 views

WmWare Workstation 11 unable to start services

when I'm trying to finish the installation and the networking services try to start an error appears. this is what the log file says about: http://pastie.org/10369516 if this thread is repeated, ...
0
votes
1answer
30 views

Ubuntu 14.04 apt-get dist-upgrade error on bcmwl-kernel-source

A dist-update I just did hung (froze) after printing line: DKMS: install completed. I had to close the terminal to kill process, and to carry on did sudo lsof /var/lib/dpkg/lock kill -15 THE-PID ...
3
votes
0answers
678 views

Kernel panic on Lenovo ThinkPad W510 Ubuntu 10.10 [closed]

When I leave my Lenovo ThinkPad W510 laptop unattended it locks the screen as it is supposed to do. But when I come back I usually find the kernel panic going on on the laptop: the Caps Lock light is ...
0
votes
0answers
59 views

Kernel panic Ubuntu 14.04 after accidently deleting the kernels

I was trying to free up some space in /boot by following this. I ran the last command which said it would delete all but the current using kernel. sudo apt-get purge $(dpkg -l ...
2
votes
2answers
5k views

What does the following dmesg output means?

I am not sure what does this following means:- [ 0.652039] ACPI: Added _OSI(Module Device) [ 0.652044] ACPI: Added _OSI(Processor Device) [ 0.652049] ACPI: Added _OSI(3.0 _SCP Extensions) [ ...
1
vote
1answer
218 views

AMD driver does not work on kernel 3.19.0-26

I am asking for a help or a fix for this black screen in Ubuntu 15.04. The black screen contains the message starting version 219 and I am stuck in there for like a day already. Been trying to find a ...
-1
votes
0answers
41 views

Bug while trying to make 4.1.6 kernel version [closed]

In file included from include/linux/gfp.h:5:0, from include/linux/device.h:29, from include/linux/dma-mapping.h:5, from include/drm/drmP.h:37, from drivers/gpu/drm/i915/intel_tv.c:33: ...
0
votes
1answer
48 views

Do Linux drivers depend on Linux kernel?

I have Ubuntu 14.04 LTS. My external bluetooth adapter is not working in this version of Ubuntu, but it is working very well in Ubuntu 12.x versions. So i downloaded and installed Ubuntu 12.x kernel ...
0
votes
0answers
25 views

Ubuntu 15.04 Upgrade / LDM Issue / 219 / Black Screen

I am kinda a new in Linux/Ubuntu and the problem which I am facing now is way above my skill/knowledge: After upgrading Ubuntu from version 14 to 15 I cannot run my OS. It seems that the issue is ...