Questions tagged [kernel]

Linux is the name of the kernel used in Ubuntu as well as other GNU/Linux operating systems. Use this tag for questions related to upgrading and installing kernels, compiling, patches, and kernel modules.

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ubuntu package update: /etc/kernel/header_postinst.d/dkms missing

I'm just doing my usual weekly update of packages on my Ubuntu machines, and Something Went Wrong (TM). I'm seeing this in the output of "sudo apt upgrade" Setting up linux-headers-4.15.0-36-...
Chris Curvey's user avatar
  • 1,643
2 votes
2 answers
3k views

DELL XPS 13 with ubuntu 18.04 Suspend Freezes

Under Ubuntu and any kernel, 4.x Laptop become unresponsive with a black screen after any suspend event (lid closed, suspend command, etc) I just bought the new XPS Signature Edition 13 and installed ...
user3483914's user avatar
2 votes
1 answer
853 views

System almost freezes when memory full

I have tested with zram or physical swap on SSD. When memory usage is very high, for example a memory leak, the system starts to swap. At this moment, top shows 10% IO wait, 20% CPU per kswapd. But ...
Magicloud's user avatar
  • 458
1 vote
1 answer
255 views

How do I update to the latest mainline kernel on a server?

I'd like to keep an Ubuntu Server 18.04 up to date with the latest mainline kernel. On the desktop I'd just use Ukuu, but I'm looking for a convenient method to use via ssh. I found this: http://...
Andreas Hartmann's user avatar
39 votes
3 answers
103k views

vmlinuz-4.18.12-041812-generic has invalid signature

I upgraded my kernel today with ukuu, and since then I cant boot because i'm getting this errors: error: /boot/vmlinuz-4.18.12-041812-generic has invalid signature error: you need to load the kernel ...
Nadav Shabtai's user avatar
1 vote
0 answers
37 views

How do I figure out which package is causing my black screen issues?

I am getting a black screen on different linux distributions (Ubuntu 18.04, Kubuntu 18.04, Manjaro GNOME 17.1.12) as long as only one monitor is enabled and connected. When 2 monitors are connected ...
Jonas J's user avatar
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1 vote
0 answers
255 views

Ubuntu 18.04 rtl8812au stops after a few hours

I think I have too much loaded ac1200 works for a while then stops.. here is what I get ... $ dmesg | grep 8812au [ 13.820591] 8812au: loading out-of-tree module taints kernel. [ 13.821569] ...
Frank Johnson's user avatar
3 votes
1 answer
197 views

linux-image-4.15.0-36* reduces the speed of rsync over ssh to 10 times less [closed]

With kernel version 4.15.0.36, the speed of rsync over ssh gets reduced to around 10 times less than with 4.15.0.34. Is this a regression? On 4.15.34, everything works as expected. If I go back to 4....
Paul Summers's user avatar
0 votes
0 answers
1k views

Wifi Driver and additional drivers issue with Ubuntu 18.04.1

A few days ago I updated my UBUNTU 16.04 version with 18.04.1 But after that, my wifi stopped working on my laptop. I'm using Acer E515 laptop and my wireless card manufacturer is Qualcomm. I also ...
Rajesh kumar's user avatar
0 votes
0 answers
35 views

Ubuntu kernel update password doesn't do anything

Over the past few months, every time a new Ubuntu kernel is installed through Software Updates, the process asks for a password to be created. The screen suggests that on reboot I will be asked to use ...
ndchome's user avatar
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3 votes
1 answer
420 views

Transfer to swap the memory data of idle software running in background while keeping in RAM only active ones?

While running 5-6 programs at the same time (Browser, Virtual Machines, Terminal, Text Editor, File Explorer), some of them from time to time (let's say every 15 minutes) are inactive/idle (not ...
Coding_is_Art's user avatar
1 vote
1 answer
6k views

Kernel Panic - Not Syncing : Attempted to Kill init?

After I removed my RAM, I got the following error: Kernel Panic - Not Syncing : Attempted to Kill init ! So I checked it a lot of times and it's working, but my Windows can't login and shows me a ...
Ivan-Petrov's user avatar
0 votes
1 answer
1k views

Has anyone built and installed a kernel for Ubuntu 18.04.1 LTS?

Has anyone: Successfully downloaded the kernel source? Successfully installed a built kernel without it crashing on startup? For Ubuntu 18.04.1? I managed to use synaptic to get linux-source ...
rob18767's user avatar
3 votes
1 answer
2k views

Unable to lock the administration directory - DPKG configure stuck on initramfs

I have problems with apt: E: Unable to lock the administration directory /var/lib/dpkg/lock E: Unable to lock the administration directory (/var/lib/dpkg/), is another process using it? I followed ...
Bobface's user avatar
  • 161
0 votes
1 answer
213 views

System gets unresponsive for 1-2 seconds every 10 seconds

I recently connected my (a littler bit older) notebook to 2 external screens, so i can work properly from home. But for some unknown reason the system acts super weird. Every 10 secods (Ubuntu 16.04 /...
Philipp Wrann's user avatar
3 votes
1 answer
12k views

How to blacklist amdgpu driver?

I have found that amdgpu driver is disturbing in suspend. I want to uninstall or blacklist it. How to blacklist amdgpu?
Arafat Hasan's user avatar
7 votes
3 answers
8k views

Ubuntu 18.04.1 kernel upgrade stuck at setting up linux-headers-4.15.0-36-generic

I am trying to upgrade kernel on my laptop and as I'm doing that very often I never had an issue until last time when I was able to fix the issue with running: sudo dpkg --configure --pending As ...
Filip C.'s user avatar
  • 106
8 votes
1 answer
3k views

"Unknown sequence editconfigs" when trying to build a kernel

I am following the instructions here: https://wiki.ubuntu.com/Kernel/BuildYourOwnKernel I ran apt-get source linux-image-$(uname -r) cd linux-signed-4.15.0 chmod a+x debian/rules chmod a+x debian/...
Lack's user avatar
  • 251
3 votes
0 answers
1k views

Broadcom BCM5764M Gig-E kernel driver problem on Server 18.04.1 LTS

Just installed Ubuntu Server on a Dell FX160 thin client. Everything seems to be working except for the onboard Gigabit Ethernet. The problem appears to be with a bug in the tg3 driver. I can verify ...
fdmillion's user avatar
  • 131
0 votes
0 answers
4k views

system is currently not set up to build kernel modules

when I tried to run the following command # /sbin/vboxconfig I got the following vboxdrv.sh: Stopping VirtualBox services. vboxdrv.sh: Starting VirtualBox services. vboxdrv.sh: Building VirtualBox ...
Salem Masoud's user avatar
3 votes
3 answers
6k views

How to install Ubuntu on ASUS F556U, JournalError error?

I'm trying to install Ubuntu 18.04 on my ASUS F556U laptop without success. I already asked other questions on the subject, thinking that the problems were by UEFI mode. Well surpassed that, I already ...
Miguel Espeso's user avatar
1 vote
2 answers
2k views

How do I fix a ASUS Eee PC to run Ubuntu 18.04 with "This kernel requires an x86-64 CPU, but only detected an i686 CPU"? [duplicate]

My son has an Eee PC and he tried to turn it into a Chromebook. It did not work and the computer is stuck on trying to load chromium. I asked an IT Tech at our school how to fix it. He suggested ...
Alice Laplant's user avatar
1 vote
1 answer
3k views

Ubuntu 18.04 PXE-booting with Realtek r8152-based NIC, no interface found

I am upgrading my PXE boot infrastructure with 18.04, but I am running into a consistent problem with our Dell XPSen - when PXE-booting from the official Dell FM76N (Realtek r8152-based) USB NICs, the ...
Gargravarr's user avatar
4 votes
1 answer
3k views

ps -ef displays kerneloops - is that harmful?

When I type: ps -ef | grep test I get the following output kernoops 998 1 0 18:15 ? 00:00:00 /usr/sbin/kerneloops --test First of all is this harmful. If it is how can I debug what ...
gansub's user avatar
  • 293
2 votes
2 answers
1k views

Usbmon error - Ubuntu 16.04 with Kernel 4.15 in Dual Boot with Windows 10

I have some problem in Ubuntu 16.04 LTS with kernel 4.15 in Dual Boot with Windows 10, with a Lenovo T480. I am trying to get some information from /sys/kernel/debug/usb/usbmon/, but I have some ...
Luca's user avatar
  • 25
1 vote
1 answer
2k views

HP envy x360 - Ubuntu 18.04 - hardware issues

I have an HP ENVY x360 Convertible 15-bq1xx and I've installed Ubuntu 18.04 and keep it updated. I have the following problems: The touchscreen doesn't work What I've found: touchscreen-on-hp-envy-...
IlGala's user avatar
  • 214
0 votes
0 answers
421 views

error while compiling kernel

while I was compiling the kernel it suddenly started giving me these errors -------------------------------------------------------------------------- drivers/net/wireless/intel/iwlwifi/mvm/tdls.o: ...
Ali Hijazi's user avatar
1 vote
0 answers
408 views

Unable to boot, because initial ram disk for kernel cannot be created

We have a server running Ubuntu 14.04 LTS. The installation and reinstallation of the last kernel package fails, because the system says 'no space left on /boot'. Though there is plenty of space. ...
aexellent's user avatar
2 votes
0 answers
141 views

What is the kernel in Ubuntu? [duplicate]

I'm new to Ubuntu. Just started my course this week. I would like a simple explanation for what the kernel is and what it does in Ubuntu.
S M Sajjad Salam's user avatar
0 votes
4 answers
9k views

Is removing old linux-headers and linux-image packages safe?

I started using Ubuntu and like it so far. I got my first system at a point where problems would really hurt. Normally I do the apt-get upgrade stuff quite brain-off but this here made me feel a bit ...
mulmer's user avatar
  • 21
4 votes
1 answer
4k views

Error while booting Ubuntu 18.04 LTS with Kernel Version 4.18.8

[ 0.077858] ACPI Error: No pointer back to namespace node in package (____ptrval____) (20180531/dsargs-303) [ 0.077858] ACPI Error: No pointer back to namespace node in package (____ptrval____) ...
Adnan Iftekhar's user avatar
6 votes
6 answers
27k views

Enroll MOK password doesn't match

I'm trying to install Virtualbox on my Ubuntu 18.04 but I encountered some problems because of Secure Boot. So I'm following this tutorial which seems a good solution. But here is my problem : When ...
Rémi's user avatar
  • 311
0 votes
1 answer
2k views

Why cpu frequency changing and it is not possible to stop this?

I am trying to disable cpu frequency scaling and limit the processor to a single speed. But something seem to be changing processor speed constantly. Any ideas on why this is happening? I am on 16.04 ...
yurtesen's user avatar
  • 460
0 votes
0 answers
1k views

Bumblebee: module 'nvidia-390' not found

I managed to get Bumblebee to run some time ago, but after an update it just completely stopped. I'm trying to set it up again but I can't get past this error [ 3270.586218] [ERROR]Module 'nvidia-390'...
Leonardo Petrucci's user avatar
0 votes
3 answers
1k views

How can I install a new stable Linux kernel without removing the older one? [duplicate]

I want to install a new stable Linux kernel without removing the older one, as I see there is an option in Ubuntu to switch on whichever kernel I want to use.
TalibChohan's user avatar
0 votes
2 answers
839 views

Why does kernel 4.4.0-135 need an explicit upgrade instead of the usual apt upgrade?

On several Ubuntu (16.04 LTS, Xenial) systems apt list --upgradable tells me that kernel upgrades are available: $ apt list --upgradable initramfs-tools/xenial-updates,xenial-updates 0.122ubuntu8.12 ...
Zeta's user avatar
  • 135
1 vote
0 answers
278 views

Ubuntu 18.04.1 LTS freezes after login

So as soon as I log in, a few seconds later Ubuntu freezes. I booted with a live CD and checked var/crash/ and found out the following report: ProblemType: KernelOops Annotation: Your system might ...
Vijay Chavda's user avatar
4 votes
3 answers
3k views

Ubuntu 18.04 on kernel 4.15.0-34-generic boots to BusyBox

The machine was a fresh install of Ubuntu 18.04.1 and used LVM and LUKS during install. The machine was working fine on kernel 4.15.0-33-generic. The kernel upgraded from 4.15.0-33 to 4.15.0-34-...
jimbob's user avatar
  • 143
2 votes
2 answers
6k views

how do I make "/sys/kernel/mm/transparent_hugepage/defrag" never status to close the THP warning [duplicate]

reboot the linux (ubuntu 16.04 redis 4.011) /var/log/redis.log shows # WARNING you have Transparent Huge Pages (THP) support enabled in your kernel. This will create latency and memory usage ...
robspin's user avatar
  • 133
3 votes
1 answer
3k views

Slow speed on Hotspot created from Ubuntu 18.04 with RTL8723BE Wireless Network Adapter

This question is duplicate of this question. I am running 18.04 and having same problems as that of the linked question that is my hotspot created by linux gives very slow internet speed on my mobile. ...
Piyush Bansal's user avatar
1 vote
1 answer
576 views

Asus FX503VD Ubuntu 18.04 touchpad now working

I am using Ubuntu 18.04 with Kernel 4.18, I have had the touchpad working before but wanted to do a dual boot so started from scratch. everything is working except touchpad. for xinput i get this ...
jason seymour's user avatar
0 votes
0 answers
57 views

Revert to old kernel [duplicate]

just upgraded to the new kernel version and now my nvidia drivers does not work properly. Is there an easy way to revert the kernel update to the old one or is a fresh installation the easier way?
Lau's user avatar
  • 101
1 vote
1 answer
424 views

Unable to use laptop after I close and open the lid

After closing the lid on my laptop (using all default settings) and opening it again, I am unable to use it and have to reboot it. I am using Ubuntu 18.04. Is there anything I could do to resolve ...
Aleksandar Kostovic's user avatar
0 votes
2 answers
108 views

Reinstall kernals - I have two kernals that I cannot boot from

I took an update from 4.15.0.33 to 4.15.0.34. My machine would not boot from the new kernel. I tried removing the latest kernel using: sudo apt-get purge linux-image-4.15.0.34-generic and sudo apt-get ...
Trebacz's user avatar
0 votes
0 answers
745 views

Nvidia init module is not rebuilt when I update kernel

After upgrading linux kernel, I have to reinstall nvidia-driver. Otherwise, the display will not use GPU. Now I need to do the following manaully after the kernel is updated sudo apt remove nvidia-...
Vimos's user avatar
  • 333
1 vote
1 answer
83 views

Same iso different kernels [closed]

I have a bare metal machine and a Virtual box vm, both installed Ubuntu 18.04.1 LTS iso, but uname --all shows different kernel versions. I need both machines to have the exact same kernel version, ...
David S's user avatar
  • 11
1 vote
3 answers
23k views

Unable to install ukuu kernel updater

I was following this tutorial: Upgrade Kernel on Ubuntu 18.04 – Linux Hint, but when it came to installing ukuu, it gave a bunch of dependency errors $ sudo apt-get install ukuu Reading package lists.....
Bokor Albert's user avatar
1 vote
1 answer
6k views

MCE error message and random reboots [closed]

May someone help me in decoding the exact significance of the following message I found in dmesg? Jan 28 15:58:17 mint kernel: mce: [Hardware Error]: CPU 0: Machine Check: 0 Bank 7: 8c00004000010093 ...
MadHatter's user avatar
  • 481
3 votes
0 answers
2k views

How to compile `linux-tools` (containing `perf` binary) from vanilla kernel sources?

I can build working kernel packages (kernel-image and kernel-headers) from vanilla kernel git sources (plus any random patches I like) following instructions at http://veithen.github.io/2013/12/19/...
Mikko Rantalainen's user avatar
1 vote
0 answers
25 views

After reinstalling the kernel, the system error has disappeared. Does this mean that everything is OK in the system?

I use Xubuntu 18.04. I wanted to install an external Wi-Fi adapter, but installing the drivers led to freezes and a system error (kernel bug in the file ...../dev.c: some string number). I removed ...
hu553in's user avatar
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