the screen rendering of 17.10 with intel i5-8400 is really slow

Question

I just bought a computer and install ubuntu 17.10 but the graph rendering is really slow.

It just like using windows without installing VGA driver except I can get the resolution of 1920x1080.

I also checked Software & updates > additional Drivers.

There is a message shown that

unknown:unknown
This device is using an alternative driver.

How can I solve this problem?

My hardware is :

intel i5-8400
msi z370 tomahawk

the message came after vainfo:

libva info: VA-API version 0.40.0
libva info: va_getDriverName() returns -1
libva error: va_getDriverName() failed with unknown libva error,driver_name=(null)
vaInitialize failed with error code -1 (unknown libva error),exit

Answer 1

Here the correct link http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.15/ After installing the kernel 4.15 the graphics rendering works fine. But after really don't works the broadcom wifi card and the command "apt-get install --reinstall bcmwl-kernel-source" don't works because he don't reinstall on this kernel.

Now i solved reinstalling kernel 4.13.0-36-generic and then following this: http://joshuakanz.com/ubuntu/Coffee-Lake-GPU-Linux-Alpha-Support/ after the recboot all so good.

Answer 2

Upgrading to linux kernel v4.15 resolved the issue.

I used the UKUU tool to manage and upgrade the linux kernel to v4.15 and it was all great after the reboot.

If you do not want to install/manage/update kernel manually through terminal, UKUU tool is the best.

Find more over here in regards to installing UKUU HERE

Answer 3

As the Ercole Comini said this link worked perfectly for me. My processor is Intel i5 8400.

For the sake of simplicity I am writing those steps here directly.

1. Copy and paste the following:

   GRUB_CMDLINE_LINUX_DEFAULT="quiet splash i915.alpha_support=1"
   

2. Open the terminal (Ctrl+Alt+T).

3. Edit your Grub file.

   sudoedit /etc/default/grub 
   

4. Find GRUB_CMDLINE_LINUX_DEFAULT="quiet splash" and replace it with what you copied from step 1.

5. Save the Grub file.

6. Update Grub.

   sudo update-grub
   

7. Reboot.

This solution may vary according to your configuration, so please do this on your own risk.

Answer 4

Ubuntu 17.10 is currently shipping kernel version 4.13. But the graphics driver for 8th generation coffee lake processors are merged in kernel mainline for version 4.15. (source)

Currently you can install 4.15 kernel Ubuntu builds to fix the graphics issue.

Download these debian packages

mkdir -p ~/linux_4.15 && cd ~/linux_4.15

wget http://kernel.ubuntu.com/~kernel-ppa/mainline/daily/2018-01-01/linux-headers-4.15.0-999-generic_4.15.0-999.201801010200_amd64.deb

wget http://kernel.ubuntu.com/~kernel-ppa/mainline/daily/2018-01-01/linux-headers-4.15.0-999_4.15.0-999.201801010200_all.deb

wget http://kernel.ubuntu.com/~kernel-ppa/mainline/daily/2018-01-01/linux-image-4.15.0-999-generic_4.15.0-999.201801010200_amd64.deb

dpkg -i *.deb

sudo update-grub

sudo reboot

Ubuntu should boot with the latest kernel image now. Your graphics rendering should be smooth.