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

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3
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4answers
192 views
+50

Lenovo ThinkPad 11e Randomly Freezes on Ubuntu 16.04

I have a Lenovo ThinkPad 11e (with the Intel chipset not the AMD), that used to experience freezes randomly under 14.04 which have persisted after a clean install of 16.04. Description of the freezes ...
1
vote
2answers
39 views
+100

How to circumvent hard link creation permission to directories on the same file system

I'm well aware of the difference between symbolic and hard links. I'm also aware of the dangers of creating hard links to directories. Nevertheless, I'm insisting on creating a hard link to a ...
0
votes
0answers
18 views

Looking for ppa kernel for ubuntu 16.04

http://kernel.ubuntu.com/~kernel-ppa/mainline/ dose not have any ppa kernels for 16.04. I have stability with current kernel/nvidia. I have frequent system freeze (when switching between VT). The ...
1
vote
0answers
107 views

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

EDIT: Upgrading to 4.5.2 stable does the same thing. Is it the AMDGPU using more resources? How can I disable, I care more about battery life, and power-saving GPU. EDIT 2: at 4.5.2 HDMI works ...
2
votes
0answers
16 views

USB Keyboard Barcode Reader Dropping Chars

I bought a barcode reader which connects over USB and mimics a keyboard. Connecting to Windows, the barcode is read correctly but connecting to Ubuntu, it drops some repeating chars. It consistently ...
4
votes
4answers
1k views

Ubuntu 16.04 Skylake 6th Generation Screen Flickering

I have a Lenovo ThinkPad t460s here. It is the NVMe PCI SSD version. The CPU is i7 6600U (Skylake 6th generation) with Intel HD 520. About a month ago (beginning March 2016), I installed Ubuntu GNOME ...
1
vote
1answer
2k views

Qualcomm Atheros Device [168c:003e] (rev 32) QCA6174 - Problems after kernel/firmware update (4.2.0-18-generic/firmware_1.149.2)

I recently updated because of a missing wifi driver (Qualcomm Atheros Device [168c:003e] - ath10k_pci) to 4.2.0-18-generic/firmware_1.149.2. The Wifi is still not working (even with the driver). ...
0
votes
1answer
22 views

ubuntu 16.04 auto load usb dvb-t dongle module

The kernel module of a dvbt usb dongle is not loaded automatically when plugged in. dmesg prints on plugin of the dongle: [25205.557608] usb 1-5: new high-speed USB device number 9 using ehci-pci ...
0
votes
0answers
40 views

Upgrading 16.04 LTS to kernel 4.5 (solve suspend/hybernate/HDMI)

The kernel 4.4.0.21 which was installed on 16.04 LTS doesn't come with an option of suspending / hybernating my Lenovo Z51-70, due to a bug or whatever, and when I upgraded to 4.4.8 my battery life ...
3
votes
1answer
24 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 ...
1
vote
1answer
4k views

any idea what type of error this is - Machine check / Kernel Panic

I have been getting the following problem running Ubuntu 12.10. Basically, it freezes completely, doesn't respond to keyboard or mouse, CAPS won't change and alt+sys req+REISUB doesn't do anything. ...
4
votes
2answers
992 views

Half-installed kernel, can't install/uninstall anything

Well, I have this problem which I am not sure how I got, but I need some help. First of all, my computer runs the Ubuntu version 14.04.3 LTS, and the current kernel (the one I get from uname -r) is ...
0
votes
0answers
7 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 ...
0
votes
0answers
9 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 ...
0
votes
0answers
15 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 ...
1
vote
0answers
27 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 ...
0
votes
0answers
28 views

“Gave up waiting for root device” on VMWare with custom kernel

I'am running Ubuntu 14.04 on WMVare virtual machine. I have built a custom kernel and succesfully installed it. But on booting up i get this "Gave up waiting for root device" message. Meanwhile it ...
4
votes
1answer
36 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 ...
-3
votes
0answers
29 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.
2
votes
1answer
6k views

Error while starting ubuntu 15.04

After i have upgraded my Dell Latitude E5540 to Ubuntu 15.04 i have the following upon booting up ! Scanning for Btrfs filesystem [FAILED] Failed to start Load Kernel Modules. See "systemctl status ...
1
vote
1answer
6k 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 ...
1
vote
1answer
29 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 ...
0
votes
2answers
853 views

How can I resolve BUILD_EXCLUSIVE error in upgrade to 3.19.7 Kernel?

I ran the following commands to upgrade from 3.19.0 to 3.19.7: $ cd /tmp $ wget ...
0
votes
0answers
10 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 ...
0
votes
0answers
29 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 ...
1
vote
1answer
14 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.
0
votes
0answers
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 ...
0
votes
0answers
11 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 ...
0
votes
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 ...
-3
votes
0answers
13 views

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
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
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 ...
0
votes
0answers
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 ...
0
votes
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 ...
4
votes
2answers
362 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?
4
votes
1answer
689 views

apt-upgrade kernel-image with custom kernel

I'm running a kernel I compiled myself (because of this) and I'm wondering what apt will do with kernel updates? The software updater currently lists (among others) these points: Conmplete Generic ...
0
votes
0answers
26 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 ...
0
votes
1answer
36 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 ...
0
votes
1answer
67 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: ...
0
votes
0answers
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 ...
7
votes
5answers
2k views

Could not load 'vboxdrv' after upgrade to Ubuntu 16.04

I upgrade from Ubuntu 15.10 to 16.04 and since then VirtualBox 5.0.18 isn't starting my VMs anymore. It complains that 'vboxdrv' isn't loaded. So I try to load it and get the following error: $ sudo ...
0
votes
0answers
49 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 ...
0
votes
2answers
941 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 ...
0
votes
1answer
24 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 ...
0
votes
1answer
77 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 ...
4
votes
7answers
20k views

ath10k installation

I have exhausted google on how to do this, compounded by being a beginner. I am trying to install this module. I have a nice new Acer Nitro (which will be even nicer once I remove dependency on win ...
24
votes
3answers
31k views

List of Ubuntu Versions with Corresponding Linux Kernel Version

Is there a list of Ubuntu versions with default corresponding Linux kernel versions somewhere? I would specifically like to know the most recent version of Ubuntu that still used Linux Kernel 2.x.
1
vote
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 ...
29
votes
2answers
31k views

What's a simple way to recompile the kernel?

I'm interested in compiling a new kernel under Ubuntu 12.04 x86 64 bit. I found this wiki page which is basically a mirror for this blog and there are a lot of steps (git, etc.) that appear useless ...
0
votes
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 ...