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

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2answers
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Kubuntu 16.04 and NVidia drivers

This question was already asked a few times already. The threads where it was asked were closed due to low quality answers. I can confirm that none of the answers worked for me - I upgraded the ...
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1answer
158 views

Do I need to upgrade to Kernel 4.2 on Ubuntu 14.04.4 LTS?

I am using Ubuntu 14.04.4 LTS on my Dell Inspiron 5548 with i5 and ATI Graphics AMD Radeon R7 M265 2GB DDR3. (First I installed Ubuntu 14.04.2 LTS then got automatically upgraded to 14.04.4 LTS but ...
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0answers
17 views

Touchpad debugging - Opinion needed

I'm trying to debug an odd touchpad problem with Ubuntu 14.04.4 on a Lenovo e460. I have followed this touchpad debugging tutorial, but it doesn't directly address the symptoms I am experiencing. ...
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0answers
35 views

Install perf at 4.5.2 kernel

Does perf affect battery life? At 4.5.2 kernel stable in 16.04 LTS the TLP output states: /sys/devices/system/cpu/intel_pstate/min_perf_pct = 18 /sys/devices/system/cpu/intel_pstate/...
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0answers
141 views

Kernel Panic - not syncing - Attempted to kill init ! exit code 0x00007f00

I am using Ubuntu 14.04 LTS dual boot with windows 8. Yesterday I was installing hadoop on my system and suddenly Ubuntu stopped working. So I have to power it off directly by pressing and holding ...
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1answer
27 views

What is the use of Kernel updation?

Now I am using Ubuntu 14.04 LTE.What is the advantage over previous version if I updated to new Kernel update?
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2answers
2k views

Kernel update gets stuck (Ubuntu 16.04, Kernel 4.4.0-22)

The software updater displayed a message that new update are available. I chose install update. Apparently, the updates were supposed to install Kernel version 4.4.0-22. But, the installation process ...
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0answers
86 views

the wifi driver is not working in Ubuntu 16.1

my droadcom chipset is BCM43142 802.11 b/g/n. I checked with the software and updates tab in the system settings and it shows that I am using a driver sourced from bcmwl kernel source.But it is still ...
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0answers
21 views

About Kernel 3.14.4

For my problem is when I install the Kernel 3.14.4 that always jump alot of this line to me : libkmod: ERROR ../libkmod/libkmod-config.c:686 kmod_co'fig_parse: /etc/modprobe.libkmod: ERROR ../libkmod/...
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0answers
44 views

Problem with installing 16.04. Tried upgrading from 14.04

I am using 14.04 for a long time. Now today morning I tried upgrading to 16.04. All the packages were downloaded and installed. But after a few moments ( when I didn't pay attention to my laptop) it ...
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0answers
20 views

Remove latest kernel

Ubuntu 14.04 comes with kernel 4.2.0-27 or newer but my laptop supports only up-to 3.13.0-85 so after installing kernel 3.13.0-85 I want to remove 4.2.0-27 but when I try it is asking to install newer ...
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1answer
74 views

Choosing a motherboard for a ubuntu build [closed]

I'm planning my first computer build. Because I love programming I decided to go with linux for a unix like operating system. I've spent hours reading about components. My first plans for a system ...
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0answers
75 views

Skip sign verification at module loading

With secure boot enabled, is there a way to load a custom kernel module not signed, or signed with an auto-generated private key? Trying to load my custom module, insmod exits with the error Required ...
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0answers
71 views

“[Firmware Bug]: ioapic 2 has no mapping iomm” after kernel update

I'm on a macbook pro and I installed ubuntu alongside osx, it works really well except the handling of lid closure, so I upgraded the kernel to 4.4.8 in order to see if it can fix the problem. In ...
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0answers
27 views

Kernel not found when booting a 16.04 USB on HP Pavilion g6 [duplicate]

I created a live USB from the Ubuntu 16 AMD64 iso using Startup Disk Creator. But every time I try to boot from the USB, it shows the error vesamenu.c32: not a COM32R image. I have an HP ...
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0answers
13 views

Import FreeBSD Kernel Module into Ubuntu

A bug in the linux kernel's USB module is stopping me from using a barcode reader with Ubuntu - USB Keyboard Barcode Reader Dropping Chars . This bug isn't present in FreeBSD. Can I use the USB ...
2
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0answers
255 views

Kernel Headers not found error on installing NVIDIA cuda drivers on Ubuntu 16.04 LTS

just tired to install the NVIDIA cuda drivers on Ubuntu 16.04 (unsupported) but I get the following error: The driver installation is unable to locate the kernel source. Please make sure that ...
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0answers
39 views

How to ping an address port?

I'm working with this code that drop packets in a specific port : #include <linux/module.h> #include <linux/string.h> #include <linux/kernel.h> #include <linux/ip.h> /* ...
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3answers
359 views

Ubuntu 16 Kernel BUG (“Oops: 0000 [#1] SMP”) related to amdgpu

I recently installed Ubuntu 16.04 on my personal notebook (Dell Inspiron 5548) and everytime I try to logout from any user account, I get a Kernel BUG ("Oops" message) related to amdgpu. I tried ...
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1answer
17 views

Oops andTainted G for DVB adaptor load

Can anyone advise on Oops and Tainted fail please? Running the 3.16.0-4-amd64 kernel and loaded media_build from v4L and supporting applications. But both of 1. Hauppage WinTV Nova TD500 and 2. PCTV ...
1
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1answer
73 views

Bluetooth not working on Ubuntu 14.04 with Wily kernel (4.2)

I have a Dell Precision M4800 using Ubuntu 14.04.4 with Wily kernel (4.2.0-35). Bluetooth is not working for me. Tried the steps in this question, as my setup seems to be exactly the same as the one ...
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1answer
171 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 ...
3
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0answers
49 views

Ubuntu dropping USB Keyboard 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 ...
0
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1answer
264 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 [...
3
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1answer
33 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 ...
0
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1answer
33 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 ...
2
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0answers
243 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 ...
1
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0answers
86 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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0answers
12 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 ...
1
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1answer
103 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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0answers
126 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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1answer
28 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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0answers
17 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
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1answer
46 views

Difference between linux kernel and Ubuntu mainline kernel [duplicate]

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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0answers
12 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
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1answer
24 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 ...
0
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1answer
194 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
126 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 ...
0
votes
1answer
249 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
300 views

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

UPDATE: I have elaborated more on the problem in another post. Read it here. 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 ...
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0answers
29 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 ...
9
votes
1answer
81 views

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 users....
0
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1answer
81 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
21 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 linux-cloud-tools-virtual-lts-...
0
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1answer
254 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 ...
1
vote
1answer
17 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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0answers
159 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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0answers
51 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
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0answers
72 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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0answers
21 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: http://unix....