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

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1answer
17 views

Servers Hardware Certification of kernel upgrades

I am trying to figure out the HW certification policy for older HW (my interest is servers). When a new point-release or HWE is available, it usually includes a Linux kernel update. Is there a ...
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0answers
5 views

scheduler: how to tune cfq to favor interactive processes

Problem: scheduler doesn't seem to favor interactive processes: On a desktop system with automatic cron-scheduled backups from one (btrfs) disk to another (ext4). The backup process mounts the idle ...
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22 views

16.04: Powering off discrete graphics results in kernel panic

I am trying to disable my discrete GPU, as I don't need the extra power and I'd rather have a longer battery life. I am currently using Ubuntu 16.04 with the 4.6.0-040600rc1-generic kernel and amdgpu ...
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0answers
13 views

Systemd Kernel Variables Error

At boot, I receive an error message [failed] failed to start apply Kernel variables. I have not used a Systemd distro until now so I'm not sure what I should be looking for. I ran this in terminal ...
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8 views

Edit “Kernal Boot Parameter” from windows to install Linux

Trying to install Linux on a new think pad and getting the error: Intel_pstate: HWP enabled Then it stops loading. It seems I need to edit the boot parameter but all instructions I can find are ...
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27 views

what is the command that deal with kernel in linux? [on hold]

what is the command that deal with kernel in Linux ? i want the All command that deal with kernel in Linux to my seminar so help me please.
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1answer
20 views

How to rebuild kernel for wacom tablet driver?

I have installed Ubuntu 16.04 and my Wacom CTL-471 completely crashes the system every time I get near the surface with the pen. Every time I have to reboot, nothing helps. So I found out that these ...
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18 views

Kubuntu 16.04: Suspend works only once after reboot

After upgrading to Kubuntu 16.04 (with default 4.4 kernel), suspending works only once after reboot. Second attempt fails, the screen goes blank, but the power remains on. After a forced reboot, I can ...
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8 views

How to Restore Ubuntu 14.04 kernel and Replace `bcmwl-kernel-source`?

I followed unsuccessfully an advice in the thread Will 16.04 Support Wlan driver of Mac air? and run sudo apt-get update sudo apt-get install bcmwl-kernel-source sudo apt-get autoremove How can ...
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1answer
12 views

Source code of usbmon

Where can I get the source code of usbmon utility. Googling didn't help me to get the source code. Any help is appreciated.
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14 views

Ubuntu 14.04 LTS & Ubuntu 15.10 - ALERT! /dev/disk/by-uuid/… dropping into shell

I got this error after some days running ubuntu alongside windows 10. I am working on an acer laptop. I tried every expected solutions in other similar questions here, but none worked for me. So I ...
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9 views

zswap: default zpool zbud not available, pool creation failed

My system seems to be working fine, but in the interest of learning, I'm investigating the red bits of my dmesg. Here's one: zswap: default zpool zbud not available zswap: pool creation failed what ...
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UPGRADE LINUX KERNEL 3.4 to 3.10 [on hold]

I am a developer but from few days i am finding way to patch linux kernel 3.4.111 to 3.5.1 at least but i can't find any way on google Thanks
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2answers
32 views

Difference between linux kernel and Ubuntu mainline kernel

As this wiki Ubuntu page says: By definition the mainline kernel builds are made from virgin unaltered mainline kernel sources and therefore do not, and should not, include any Ubuntu patches ...
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10 views

Access to hard-drive when machine won't boot

Recently I tried to downgrade my kernel (from 3.13 to 2.6.24), and I made sure that the 2.6.24 kernel compiled and installed without any errors. I also updated the grub file to boot with the newly ...
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1answer
17 views

how to use a kernel patch?

I have a problem with my sound card and there is a patch on git that seem to repair my problem. here the patch But I don't know how to use patch. Someone can help me? edit :I saw that how to build ...
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1answer
33 views

How to remove new kernel and make older default (16.04)

I upgraded my kernel to version 4.4.8 in an attempt to enable suspend/hybernate, but in turn it decreased the battery life. So i want to either a. delete je 4.4.8 and revert to 4.4.0 kernel in my ...
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2answers
42 views

How to set previous kernel as default in GRUB (Grub customizer)

Can you guys please help me use Grub Customizer to set an older version of the kernel 4.4.0 of Ubuntu 16.04 LTS as default when booting? I'm not using a dual boot system, and I have installed 4.4.8 ...
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37 views

Upgrading to 4.6.0-rc6 kernel fixed my flickering screen issue but now WiFi doesn't work (Dell XPS 13)

I have a 2016 Dell XPS 13 (FullHD display, i5 version). It has a Broadcom wifi module (BCM4350) which you might know has pretty terrible Linux support. However, it is supported by the Linux kernel ...
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0answers
76 views

Battery life reduced after upgrade to kernel 4.4.8 (16.04 LTS)

I upgraded from 4.4.0 kernel to 4.4.8 due to unability to suspend/hybernate my Ubuntu 16.04 LTS on Lenovo z51-70 and now it would seem my battery life has somehow halved. I used to be able to have 2.5 ...
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24 views

Kernel Panic while attempting to Install Lubuntu 15

In order to revive my old desktop PC, I chose Lubuntu as my next working environment. If i give preference to CD boot onto BIOS (usb not supported), it would fail. Nevertheless, I managed to boot ...
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1answer
33 views
+100

How to ensure user separation on an old school shell server

I want to run an old school shell server for a couple of people, ie. one where users get ssh access so they can run software (their own or provided). My concern is appropriate separation between ...
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1answer
23 views

Errors while compile a kernel for an android device

I hope you have a nice day, I'm new with this, just searched and searched about my situation but no answer, about 40 thread here and here no one helped me, so I am feeling shy to ask you this ...
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0answers
17 views

packages have been kept back [duplicate]

When I run apt-get upgrade, I am presented with: The following packages have been kept back: apache2 apache2-bin apache2-data linux-cloud-tools-generic-lts-wily ...
0
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1answer
71 views

Kernel panic on boot after fresh install of 16.04

I had Ubuntu 15.10 running fine on my Thinkpad x200. The live USB of 16.04 runs fine, ran a check on it's files - checks out ok. Told the installer to format the ext4 drive and install 16.04 from ...
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1answer
14 views

Does manual kernel update affect the next regular automatic update?

I installed the kernel 4.4.8 manually from http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.4.8-wily/ to circumvent a bug. Now I wonder what will happen when this kernel gets officially distributed by ...
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58 views

Virtualbox doesn't work after upgrading to kernel 4.4

At the time of installation, it displayed the following message Setting up linux-image-generic-lts-xenial (4.4.0.21.11) ... Setting up linux-headers-4.4.0-21 (4.4.0-21.37~14.04.1) ... ...
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24 views

System Log warning “wrong connector dpms state” Dell Inspiron 1525

I just installed Ubuntu 14.04 on a Dell Inspiron 1525 laptop (Intel Celeron(R) CPU 540 @ 1.86GHz processor, Intel 965GM graphics, 64-bit OS, 4 GiB memory). I am not having any noticeable operating ...
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0answers
29 views

Broadcom BCM43142[14e4:4365] driver doesn't work with kernel 4.4

After getting this question question closed I installed kernel 4.4 and the problem of the wireless card on Ubuntu 14.04 installation still remains unsolved. Any suggestion?
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11 views

What is memmap and how do you use it?

I have a faulty memory with a consistent offset, and according to UnixSE, I could use memmap to solve this problem by having the kernel avoiding this certain offset via memmap: ...
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24 views

Unsupported Linux Kernel on 14.04

While checking the support status on my Ubuntu Server, the currently used Kernel came up as unsupported: x@x:~⟫ ubuntu-support-status --show-unsupported [...] Unsupported: linux-headers-3.19.0-58 ...
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30 views

Broadcom BCM43142[14e4:4365] driver doesn't work with kernel 4.4.8 [closed]

I was running my Ubuntu Trusty with kernel 3.16 but I thought of trying a newer kernel and decided to download and install kernel 4.4.8 generic and now the OS doesn't detect my Broadcom wireless card. ...
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32 views

Potential Solution for ASUS X455LB Touchpad not working after Resume

I'll preface this by saying that I'm still fairly novice to using Linux but am really keen on using/learning it. I've been having troubles with Ubuntu (15.10 and now 16.04) lately after I installed ...
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30 views

Not enough free space on /boot to upgrade 14.04 - already cleared kernels, what else is here? [duplicate]

When software tries to update, I get a message that there's not enough disk space on /boot. I've got rid of old kernels and emptied trash, but there still isn't enough space. According to gparted, the ...
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1answer
63 views

After install xubuntu 16, starting gives errors

The installation procedure was completely successful, but starting the new OS brings a lot of errors and blocks. Here some of the messages I see: Starting init: /bin/sh exists but couldn't execute ...
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2answers
318 views

Why do I get “Required key not available” when install DKMS modules in Ubuntu 16.04?

When I try to install DKMS modules like VirtualBox, Nvidia, or Broadcom drivers, they do not install and I get Required key not available. How can I fix it?
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2answers
32 views

unable to install applications from software centre. Installation failing

installArchives() failed: perl: warning: Setting locale failed. perl: warning: Please check that your locale settings: LANGUAGE = (unset), LC_ALL = (unset), LANG = "en_IN.ISO8859-1" ...
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2answers
784 views

vmware error after upgrade to ubuntu 16.04

I just upgraded to ubuntu 16.04 and I started having problems with vmware (v 12.1.0 build-3272444). When I try to play the virtual machine I receive the following error: Could not open /dev/vmmon: No ...
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0answers
113 views

Kernel Panic when setting up Ubuntu 16.04 with VirtualBox

FIRST NOTE: I tried the solution proposed by this topic, but it did not work. Besides, the fact that I've reinstalled Windows recently could (or could not) make my situation a little different. Some ...
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0answers
57 views

Kernel freeze on wake up 16.04

I've been using ubuntu for a couple of months now and after kernel 3.56, I started seeing a problem when I wake up my pc. Basically, the first few second everything is working fine and then mouse, ...
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12 views

Lost system after update

I know similar subject was in forum not once, but answers which I found did not solve my problem. I have Netbook Lenovo S10-3 (old and slow) I was using Kubuntu for a long time, but about 2 weeks ago ...
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2answers
41 views

Linux Support for builtin wifi adapters in Thinkpad T-series and Dell XPS?

Ubuntu 14.04 on my Thinkpad T400 sometimes has the problem of the builtin wifi adapter stops working, and I haven't found a way of solving it, albeit asking quite a few questions in this forum. I ...
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0answers
5 views

unity and top bar not showing. non-standard fixits are working

I've used every method to get unity and top bar to show. it worked for a bit yesterday, but most programs didn't want to work. everytime I do update or upgrade or reinstall, I get a sa-compiler ...
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1answer
327 views

Ubuntu 16.04 kernel 4.4.0-21 not loading nvidia/vboxdrv modules anymore (Required key not available)

The latest kernel for Ubuntu 16.04 (4.4.0-21) doesn't load the nvidia (and vboxdrv) module anymore. $ sudo modprobe -v nvidia insmod /lib/modules/4.4.0-21-generic/updates/dkms/nvidia_361.ko ...
41
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1answer
3k views

Why doesn't the latest Ubuntu edition come with the latest stable Linux kernel version?

I have recently noticed that the latest version of Ubuntu does not come with the latest stable Linux kernel version. For example, Kubuntu 16.04 LTS comes with Kernel 4.4.0-21-generic while the latest ...
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33 views

I have problem with instalation Ubuntu

Good morning, I have a problem. When I installed Ubuntu and at the end of the installation appears this error. I instal Ubuntu from Flash drive. [ 560.312235] Kernel panic - not syncing: Attemped to ...
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1answer
59 views

UFW not working in 16.04 server. Refers to earlier kernel module?

I am trying to move our mail server based on 12.04 to a brand new installation of 16.04 server. When I run sudo ufw status, I get: ERROR: problem running iptables: modprobe: ERROR: ...
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23 views

End kernel panic

I recently upgraded my pc to an r9 290x and a new 750w psu and I had an extra gtx 660 and 500w psu so I grabbed one of my old pcs with a horrible 3500+ cpu and installed ubuntu on it since the ...
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3answers
1k views

Solved ! Grub Installation Failed Ubuntu 16.04 fresh Installation, Unable to Boot form USB

I was trying to fresh install Ubuntu 16.04 on DELL 3521, Previously i was using 15.04. System was getting slow so i wanted to install fresh, I deleted the /, /boot, /swap and recreated. There are ...
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34 views

Brightness Fn key slow to change N3700 ( I've tried everything! )

I have an Acer R3-131T with the new Broadwell Intel Pentium N3700. My brightness works if it is adjusted in the system settings but when I use the combo "fn+brightness key (in this laptop are the ...