Intel Drivers Artifacts after Mesa-Dev Update

[.]

After the update from the 20.04 LTS fresh live image from 19.3.3-1ubuntu1 to 20.0.0-1ubuntu1 mesa
I get serious artifacts on startup when using the intel driver instead of modesetting. These artifacts go away when I enable Option AccelMethod "uxa" but persist if the default, "sna" or the other modes are used "none", "off", "blt".

These pixels appear throughout the experience of using Ubuntu and generate in sporadic places. The font also looks completely broken. I've never had this issue before with the Intel drivers. I have Skylake HD 530.

[. (asdsa232323232-deactivatedaccount)]

I will not provide additional data out of respect for my own privacy of which machine metal specifications I have.

I will only say that I have a Mesa Intel(R) HD Graphics 530 (SKL GT2)
The current build of Ubuntu with all the latest updates.
A 20-intel.conf file with the following config in /etc/X11/xorg.conf.d/:

Section "Device"
  Identifier "Intel Graphics"
  Driver "intel"
EndSection

When Option AccelMethod "uxa" is applied this bug appears to be cured.

This bug with artifacts occurs when Ubuntu Base drivers are upgrading Mesa from 19.3.3-1 to 20.0.0-1.

Thank you.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[corrado venturini (corradoventu)]

I have a similar problem, the fonts are broken, just small rectangles: https://www.ap-i.net/mantis/view.php?id=2291
corrado@corrado-x5-ff-0309:~$ inxi -SCGxx
System:
  Host: corrado-x5-ff-0309 Kernel: 5.4.0-14-generic x86_64 bits: 64
  compiler: gcc v: 9.2.1 Desktop: Gnome 3.35.91 wm: gnome-shell dm: GDM3
  Distro: Ubuntu 20.04 LTS (Focal Fossa)
CPU:
  Topology: Dual Core model: Intel Core i3-7100 bits: 64 type: MT MCP
  arch: Kaby Lake rev: 9 L2 cache: 3072 KiB
  flags: avx avx2 lm nx pae sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx
  bogomips: 31199
  Speed: 801 MHz min/max: 800/3900 MHz Core speeds (MHz): 1: 800 2: 800
  3: 800 4: 802
Graphics:
  Device-1: Intel HD Graphics 630 vendor: ASRock driver: i915 v: kernel
  bus ID: 00:02.0 chip ID: 8086:5912
  Display: x11 server: X.Org 1.20.7 driver: i915 compositor: gnome-shell
  resolution: 1920x1080~60Hz
  OpenGL: renderer: Mesa Intel HD Graphics 630 (KBL GT2) v: 4.6 Mesa 20.0.0
  direct render: Yes
corrado@corrado-x5-ff-0309:~$

[Loop (matt-theworldtree)]

Having the same issue with HD Graphics 515 (Asus Chromebook C302ca). Switching to uxa as noted above gets rid of the artifacting / font distortion, though note that you'll need to add quotes around both "AccelMethod" and "uxa" or X won't start.

Alternatively, you can use Wayland and the artifacts don't appear.

Unfortunately even with this change it seems to interfere with video acceleration- both Steam streaming and Shadow streaming fail to start.

[Tanvir Hussain (tan10vir)]

I am facing the same issue with Intel HD Graphics 520 [Skylake GT2].

On switching to Ubuntu Wayland, the artifacts are gone.

[Timo Aaltonen (tjaalton)]

so you either don't use the obsolete intel X driver or force the old DRI driver (i965) to work around this

[zasran (erik-zasran)]

Just upgraded to Ubuntu 20.4, seeing same symptoms, screen artifacts after X startup and some fonts corruption. Font problems are in some applications/windows only, e.g. Chrome window, gvim, terminal are all fine (so far). However Unity taskbar and System tray usually have broken fonts (some characters).

Video card: 00:02.0 VGA compatible controller: Intel Corporation Iris Plus Graphics 655 (rev 01)

It happens with or without custom config (needed to stop video tearing):

Section "Device"
Identifier "Intel Graphics"
Driver "Intel"
Option "AccelMethod" "sna"
Option "TearFree" "true"
Option "TripleBuffer" "true"
Option "MigrationHeuristic" "greedy"
Option "Tiling" "true"
Option "Pageflip" "true"
Option "ExaNoComposite" "false"
Option "Tiling" "true"
Option "Pageflip" "true"
EndSection

Also tried Wayland but it's a no go because it freezes right after I enter password in gdm3.

[Tanvir Hussain (tan10vir)]

I could remove the artifact by uninstalling Intel drivers.

sudo apt purge xserver-xorg-video-intel

Reboot.

[Mayk (mayk)]

Can confirm this happened also on a thinkpad T490s upgrade from 19.10 to 20.04 . The xserver-zxrg-video-intel purge solved the issue.

[Warcrime (mg-d)]

Also ran into this bug. Commenting out options for the Device:Driver "intel" in the config files helped.

[Tina Johnson (tinajohnson-1234)]

Can confirm this for Thinkpad X1 Carbon after upgrading to 20.04.

[Nicolas (nicolas-hoeft)]

I have the same issue on Thinkpad X250 on 20.04 with the following config:
```
Section "Device"
   Identifier "Intel Graphics"
   Driver "intel"
   Option "AccelMethod" "uxa"
   Option "TearFree" "true"
EndSection
```

resulting in being unable to use plasma wayland sessions, random system freezes and strong flickering in sddm. purging `xserver-xorg-video-intel` solved the issue for me

[zasran (erik-zasran)]

I don't see this issue anymore, not sure when it was fixed, currently have Ubuntu 20.10:

xserver-xorg-video-intel 2:2.99.917+git20200714-1