[Solved] Freezing of screen on Ubuntu 16.04
I have recently installed Ubuntu 16.04 and it seems to freeze randomly. I tried to check out the the solutions at Ubuntu 15.10 and 16.04 keep freezing randomly but on installing these kernels, I got a kernel panic at boot, so I furthur looked for solutions at Ubuntu 16.04 constantly freezing leading to kernel panic but couldn’t figure out how to resolve the problem. Can anyone tell me which exact kernels to install so that both issues (kernel panic and random freezing) is resolved?
The kernel that came preinstalled with 16.04 was 4.4.0-21-generic and these are some extra details:
Distributor ID: Ubuntu Description: Ubuntu 16.04 LTS Release: 16.04 Codename: xenial Processor: Intel® Pentium(R) CPU N3540 @ 2.16GHz × 4 Graphics: Gallium 0.4 on llvmpipe (LLVM 3.8, 128 bits) Ram : 4Gb Os type - 64 bit architecture
Do tell me if I need to provide any other details.
Edit – 1 )
[email protected]:~$ sudo dpkg -l | grep linux-headers-4.7*.deb [sudo] password for saisumit: [email protected]:~$ sudo dpkg -l |grep linux-image-4.7*.deb [email protected]:~$ sudo update-grub Generating grub configuration file ... Warning: Setting GRUB_TIMEOUT to a non-zero value when GRUB_HIDDEN_TIMEOUT is set is no longer supported. Found linux image: /boot/vmlinuz-4.7.0-040700rc3-generic Found initrd image: /boot/initrd.img-4.7.0-040700rc3-generic Found linux image: /boot/vmlinuz-4.4.0-21-generic Found initrd image: /boot/initrd.img-4.4.0-21-generic Adding boot menu entry for EFI firmware configuration done [email protected]:~$
I installed using this method
wget kernel.ubuntu.com/~kernel-ppa/mainline/v4.7-rc3-yakkety/linux-headers-4.7.0-040700rc3_4.7.0-040700rc3.201606121131_all.deb wget kernel.ubuntu.com/~kernel-ppa/mainline/v4.7-rc3-yakkety/linux-headers-4.7.0-040700rc3-generic_4.7.0-040700rc3.201606121131_i386.deb wget kernel.ubuntu.com/~kernel-ppa/mainline/v4.7-rc3-yakkety/linux-image-4.7.0-040700rc3-generic_4.7.0-040700rc3.201606121131_i386.deb sudo dpkg -i linux-headers-4.7*.deb linux-image-4.7*.deb
EDIT – 2
( installed grub customizer )
sudo add-apt-repository ppa:danielrichter2007/grub-customizer sudo apt-get update sudo apt-get install grub-customizer
Your processor is affected by the c-state bug
which causes total freezes when the CPU tries to enter an unsupported sleep state. It’s a problem for many Bay Trail devices especially with newer (4.*) kernels.
There is a simple workaround for this until it gets properly fixed upstream. You just need to pass a kernel boot parameter and the random freezing stops completely.
You do this by editing the configuration file for GRUB:
Boot Ubuntu and open a terminal by pressing ctrl+alt+t then type
sudo nano /etc/default/grub
Find the line
This needs to be changed to include
So after your edit it reads
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash intel_idle.max_cstate=1"
If you have other boot parameters already besides quiet and splash, just leave them alone.
Now save the file by pressing ctrl+o then enter and exit by pressing ctrl+x
To revert to an older kernel from a higher version installed manually, reboot the system and enter the GRUB menu by pressing shift. At the GRUB screen select Advanced Options For Ubuntu and select the kernel you want to boot (
4.4.0-21-generic in your case)
When the system has booted, before deleting anything check
uname -r to be sure you have booted the correct kernel.
The system will boot the highest kernel by default, so you need to delete the newer one yourself. All you need to do is delete the files that relate to it, so find the version string of the kernel you want to delete… if you installed by the debian method:
dpkg -l | grep linux-image
if you installed with
make install do
ls /boot to see installed kernel versions
Let’s say the kernel you want to remove has the release string
4.7.0-040700rc3-generic. You can find all the files relating to this kernel:
sudo updatedb && locate -b -e 4.7.0-040700rc3-generic
to delete them you can use
xargs (assuming you’ve already run
locate -b -e 4.7.0-040700rc3-generic | xargs -p sudo rm -r
xargs ask for confirmation before executing
rm -r on the located files. It will throw errors for files which are not directories because you are trying to delete them recursively, but it will still work. Finally run