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Questions tagged [kernel]

Questions concerning the Linux kernel in Ubuntu. Issues may including upgrading and installing kernels, compiling, patches, and kernel modules.

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18.04 fresh installation: screen goes black

I am quite new to Ubuntu and Linux in general. Did a fresh install of 18.04. The screen goes black in some point, then video signal disappears. Already happened twice within two hours. Don't know from ...
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24 views

Why is Ubuntu 18.04 shutting down system?

Ever since I upgraded my main system from a ridiculously old open-SUSE distribution to Ubuntu 18.04, I have had problems with the system crashing on me. Whatever is going wrong takes a while to build ...
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Can't get kernel source because GPG can't find public key, but public key is in apt database

I'm trying to download the kernel source of my Ubuntu 16.04. Although I added the key FBFD0D3E (cascardo@canonical.com), apt/gpg thinks it's not there: apt-get source linux-image-$(uname -r) Reading ...
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1answer
18 views

cat /sys/kernel/debug/dri/0/i915_display_info: Operation not permitted

I want to get display info of my current system.So I used the following command: sudo cat /sys/kernel/debug/dri/0/i915_display_info It displays me : cat: /sys/kernel/debug/dri/0/i915_display_info: ...
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21 views

Does Ubuntu now use bpfilter or netfilter?

I'm trying to put together a firewall/router using netinstall of Ubuntu 18.10 with bpfilter. I know it's packaged by default with kernel >=4.18 these days, but I'm a little confused about how to ...
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1answer
38 views

Safely removing USB 3.0 drive freezes the system - why and how to fix?

I'm running Ubuntu 16.04.5 LTS amd64 with 4.4.0-140-generic Linux kernel. After one of recent upgrades I got new unexpected behavior - when I select Safely remove drive in Caja click Power off the ...
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1answer
70 views

Ubuntu 18.04 WiFi Networks are not displaying even though there are 3 nearby

I recently installed Ubuntu 18.04 on my 2009 mac mini. I used a bootable flash drive and all is well. Initially, WiFi adapter where not found, but after going into the Software & Updates > ...
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1answer
134 views

dpkg --list 'linux-image-*' results in Unknown / Not installed

So I'm manually deleting old kernels and did a dpkg --list 'linux-image-*' and I get: Desired=Unknown/Install/Remove/Purge/Hold | Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/...
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Booting/Filesystem corruption 18.04

I have hugely messed up my computer I think. here is a reddit thread with more info Hard to explain all of it, but the thread has all of the info and pastebin stuff. There is "partition 1" which has ...
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1answer
39 views

18.04 hangs on boot after system software update (Linux 4.15.0-35) (posted on 7 Dec 2018)

after having updated my 18.04 Xubuntu it won't show up the boot up splash window (I have automatic log in activated), my machine gets stuck on exactly the same place as the picture in this post shows: ...
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Applying Alt+Shift(L) for changing language on Debian 9 [on hold]

Im a new user of Debian 9 (Kernel 4.9.0) and recently i had some issues by applying the "Alt+Shift(L)" keyboard shortcut for changing language`s. I tried to adjust the shortcut directly from the ...
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30 views

Several errors in dmesg

Hello my system's features are as follows: Hardware: Processor: Intel Core i7-8750H @ 4.10GHz (12 Cores), Motherboard: Dell 0M2MWX, Chipset: Intel Device a36f, Memory: 16384MB, Disk: 1000GB Seagate ...
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21 views

network breaks, kern.log reports call trace 18.04LTS-64Bit

My nc4400 laptop is having its network connection breakdown. After many minutes the kernel will create a call trace and break the network. It is connecting via wlp16s0 How can this be fixed? The kern....
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26 views

Installing VMware on Ubuntu Linux (Chromebook)

Linux Version:4.4.162-15480-g2e5698de443c Here is the list of commands I'm trying in order to "fix" the 1908 Kernel error for VMware /sbin/vboxconfig output OUTPUT rm: cannot remove '/sbin/...
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0answers
30 views

Error installing flatpack

After doing this: sudo add-apt-repository ppa:alexlarsson/flatpak sudo apt update sudo apt install flatpak I am getting this error: E: Your kernels are unsigned. This system will fail to ...
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33 views

Cannot use auto remove for kernel version i do not have [duplicate]

I cannot install anymore packages on my ubuntu 16.04. When i try to use apt-get -f autoremove i have this error depmod: FATAL: could not load /boot/System.map-4.4.0-139-generic: No such file or ...
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29 views

Any File Path on Ubuntu Use C programing [closed]

How to find any file path using C programing on ubuntu
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0answers
27 views

Can't Install Linux Headers on Chromebook [closed]

I have been trying to install Digimend so that i can use my Huion H610 pro on my chromebook, but one of the steps calls for having headers installed. When I run the command to install headers, I come ...
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39 views

When installing any software the terminal hangs on “Building initial module 4.15.0-42-generic"

When I am installing any software, the terminal is hanging on building initial module for 4.15.0.42-generic Loading new openafs-1.6.15 DKMS files... First Installation: checking all kernels... ...
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0answers
71 views

Can't install new software in the server [duplicate]

I'm trying to install vsftpd on Ubuntu 18.04 LTS, but when I run apt-get install vsftpd I get this error: You might want to run 'apt --fix-broken install' to correct these. The following packages ...
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38 views

Ubuntu 18.04 - Kernel build frustration

I am totally frustrated after 3 days trying to build a kernel for Ubuntu 18.04. I needed to build a kernel to enable "RT_GROUP_SCHED" which is required by mininet. The documentation is contradictory. ...
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30 views

Ubuntu 18.10 CPU scaling_max_freq is lower than hardware capability

I currently have a Ryzen 1700X processor and I when run $ cpupower frequency-info I get the following output: ... hardware limits: 2.20 GHz - 3.40 GHz available frequency steps: 3.40 GHz, 3.00 ...
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24 views

Black screen after install custom kernel

am trying install kernel from http://kernel.ubuntu.com/~kernel-ppa/mainline/ on my notebook HP 455 with dedicated radeon graphics. I have successfully installed a newer kernel. But I got black screen ...
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17 views

ASUS Precision Touchpad not listed/found in ubuntu. ASUS TUF FX504GE-EN224T

This is a new laptop version from ASUS. I have somehow installed ubuntu on it after referring to various posts. But still, I am not able to configure the touchpad. There are solutions proposed that ...
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22 views

Ryzen 3, GA-AX370 Gaming Motherboard and Ubuntu 18.04 Stability

I've installed Ubuntu 18.04 LTS on my PC with Ryzen 3 2200G APU and GA-AX370 gaming 3 motherboard. Some people say that just installing the latest Ubuntu kernel is sufficient and after installing 4.17,...
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1answer
48 views

Why do not I have 64 bit options on General -> Basic -> Version and also UEFI in bios?(trying to install ubuntu on vm and getting kernel error) [duplicate]

I'm trying to install Ubuntu on a virtual box and I get this error "This kernel requires an x86-64 CPU, but only detected an i686 CPU." When I go to General -> Basic -> Version I do not find any 64 ...
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24 views

Ubuntu 18.04 long boot

Im beginner with Ubuntu, few days ago a friend drew my attention to long system boot. After the first steps to recognize this problem, i think the main problem is the long start-up time Kernel. ...
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1answer
39 views

Ubuntu 18.04.1 LTS Bluetooth device [0cf3:3004] particular issue kernel fixed but not able to find devices

I have been trying to enable my bluetooth of my laptop (Lenovo Ideapad-Y400), it comes with a Atheros bluetooth that has some problems with the kernel. First of all I wasn't able to turn on my ...
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17 views

Is kernel 4.15.0.39-generic is resetting the BIOS

So I've had this on 3 machines now 2 were the same manufacturer and one not the same. Since upgrading to kernel 4.15.0.39-generic I've been getting Real Time Clock errors where the BIOS is reset back ...
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22 views

How do I know if the STIBP slow patches were backported to my ubuntu kernel?

This article https://www.phoronix.com/scan.php?page=article&item=linux-420wip-stibp&num=1 discusses the performance impact of recent STIBP patches were released in kernel 4.19 and backported ...
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41 views

Avoid Ubuntu kernel Upgrade

So I have marked linux-image-generic and linux-headers-generic on hold so I can run my desktop on old kernel even after an upgrade. But I see that if I am doing dist-upgrade it is upgrading the kernel ...
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9 views

Add SND_HDA_INPUT_JACK flag to existing kernel

I need to have SND_HDA_INPUT_JACK=y in my kernel to have JACK plug in/out notifications. How can i add it to my kernel? O.S: Ubuntu Server 18.10 uname -r: 4.18.0-11-generic cat /boot/config-4.18.0-1*...
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31 views

Magic Numbers for IOCTL Commands [closed]

To add ioctl functionality to your device driver, you have to define unique ioctl commands. To accomplish this, some linux macros are used. These macros are located in header file include/asm/ioctl.h. ...
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9 views

GRUB not getting updated in virtual box

I have installed 2 custom versions of linux kernel in my ubuntu 16.10 virtualbox . I followed below link for the same. https://wiki.ubuntu.com/KernelTeam/GitKernelBuild Before reboot, I did sudo ...
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32 views

Linux-modules 4-19-4-041904

I guys, long time no see... no i need to get back on Ubuntu and some how, because of my bad contact cable of my keyboard make the system saying exists an error and because of that, the system override ...
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49 views

Install latest kernel after /boot cleanup

I inherited a server with Ubuntu 16.04 and a crazy uptime and /boot in a small separated partition with no space left. My installed kernels were: ii linux-image-4.4.0-116-generic 4.4.0-116.140 ...
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2answers
40 views

Unsigned kernel and Secure Boot

I have just bought a Lenovo Ideapad 330 and installed 18.04LTS. Turns out, touchpad is not working. I found a solution for the touchpad here: Lenovo IdeaPad 330 touchpad not working I then downloaded ...
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18 views

unable to remove old kernel in Ubuntu 18.04 [duplicate]

$sudo dpkg --purge linux-image-4.15.0-29-generic:i386 (Reading database ... 147682 files and directories currently installed.) Removing linux-image-4.15.0-29-generic:i386 (4.15.0-29.31) ... /etc/...
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1answer
137 views

kernel 4.18.0.11.12 trouble: Video black screen

I've had a comedy of video errors that all trace back to a kernel upgrade in Ubuntu 18.10 cosmic. The kernel 4.18.0.11.12 causes trouble, well, in every conceivable way and I can't quite understand ...
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2answers
60 views

How to install packages with no internet / Update to 18.04 - no WiFi anymore

After the update my WiFi connection is broken. I do not have the option to use a wired connection on this machine. I was familiar with the fact that I had to recompile the WiFi driver (rtl8188eu) ...
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2answers
169 views

VMWare 15 Error on Ubuntu 18.4 - Could not open /dev/vmmon: No such file or directory

After exhausting research online and youtube videos and facing failure to all those suggested solutions, I need your professional help with this please. Installed VMWare workstation 15 on Ubuntu 18.4 ...
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34 views

error while installing wifi adapter driver in ubuntu 18.04

rtl8188EUS_linux_v4.1.4_6773.20130222.tar.gz rtl8188EUS_linux_v4.1.4_6773.20130222/ rtl8188EUS_linux_v4.1.4_6773.20130222/runwpa rtl8188EUS_linux_v4.1.4_6773.20130222/core/ rtl8188EUS_linux_v4.1....
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134 views

Ubuntu 18.10 constantly crashing

My laptop is an Acer Predator Helios 300, Intel® Core™ i7-7700HQ, 16GiB RAM, NVIDIA GTX1060 6GB (nvidia-driver-410) running Ubuntu 18.10. Ubuntu is very frequently crashing (something between every ...
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23 views

What Ubuntu Kernel Extensions were installed to enable SSD to run on non-AHCI motherboard?

A Dell Optiplex 390 is successfully outfitted with an SSD + 16.04. The internet indicates motherboard does not feature AHCI capability and that kernel extension are necessary to implement AHCI. ...
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1answer
111 views

initrd.img and vmlinuz how to install the one just 1 lower than the higer? Ubuntu 18.04

I have not updated my Ubuntu 18.04 Since long days. today i have run sudo apt update && sudo apt upgrade after this i did sudo update-grub which gave below result. pratap@i7-6550U:~$ sudo ...
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1answer
58 views

Is it OK to use an Ubuntu kernel for Linux Mint? [closed]

My question is simple. Is it OK to use an Ubuntu kernel for Linux Mint? My Linux Kernel for Ubuntu is version 4.4.0-31. However, I would like to use it for Linux Mint 19 Tara because it has all the ...
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77 views

Ubuntu 18.04 trouble

I have two problems, first one: I cannot send files via Bluetooth to any other device, I can connect Bluetooth and the laptop receives audio and play the music from my other device. Second one: ...
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17 views

Rebuilding Ubuntu or Linux Mint with a kernel module

Goal My goal is very simple. To be able to rebuild Ubuntu/Linux Mint with a kernel module. I want to dual boot a Linux distro. However, it requires the macbook-spi driver for my keyboard and ...
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63 views

Kernel panic after upgrade to 18.04, boot-repair via usbflash failed

My boot directory seems to be full. I can't find a manual how to delete old kernels via usbflash. I don't know how to get to the hard drive boot folder when operating in usbflash. And I am afraid to ...
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0answers
40 views

RTAI 5.0.1 with linux kernel 4.4.43 on UBUNTU 18.04

I am trying to install RTAI 5.0.1 with linux kernel 4.4.43 on UBUNTU 18.04, following this guide that is from UBUNTU 16.04 but I think it helps me: https://sites.google.com/site/thefreakengineer/...