Arch Linux

shaief

Member

Registered: 2014-10-29

Posts: 8

Gnome shell and GDM ghosts/leftovers on screen

I have an updated Arch Linux installation, but for a half a year i have this distorted GDM menu and the same in Gnome Shell:
ghosts on GDM (animated gif): https://i.stack.imgur.com/VvhCR.gif

I had a more serious issue as described here: https://superuser.com/questions/1433896 … vy-tearing and i asked the Dell Support team to replace my motherboard and memory, as they did just last Thursday. I hoped that it will solve the ghosts/leftovers issues as well, but the remained.

Now i'm trying to solve this issue (which isn't visible under i3wm). What i've done so far?

• I tried both modsetting and intel driver

• I tried DRI 3 and 2

• I tried SNA and UXA

• I tried the TearFree option

and also kernel parameters:

• i915.enable_rc6=0

• i915.enable_psr=0

• i915.modset=0

• intel.modset=0

And this unwanted behavior keeps showing.

I'll be happy to get help on this one, thanks!

Last edited by shaief (2019-05-27 06:45:09)

seth

Member

Registered: 2012-09-03

Posts: 51,056

Re: Gnome shell and GDM ghosts/leftovers on screen

GDM and gnome will default to wayland, https://wiki.archlinux.org/index.php/GD … rg_backend

Please replace the image w/ a link and warn ppl. about the animated moiré.
Also, to be sure: the issue are the menu background colors? The heavy grain and the moiré are just in the recording?

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shaief

Member

Registered: 2014-10-29

Posts: 8

Re: Gnome shell and GDM ghosts/leftovers on screen

Thank you for replying!
I changed the embedded image to a link with a warning.

The background grain and moiré are just in the recording, thanks for pointing it out.

What do you mean re: default to wayland? is it a known issue with wayland?

Last edited by shaief (2019-05-27 06:47:27)

seth

Member

Registered: 2012-09-03

Posts: 51,056

Re: Gnome shell and GDM ghosts/leftovers on screen

idk whether it's "known", but the pattern you described (+gdm + gnome -i3) sounds suspicious enough to check whether this is indeed rather wayland than gtk related. If it is, the next step would be wheter Qt5 on wayland is affected as well.
Also it's important to note that if you're using wayland the upper section of your tests is moot, because they'll only applay to Xorg (w/ *maybe* the exception of the dri version, idk. whether gnome-shell cares about that setting)

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How to upload text · How to boot w/o GUI · Disable Windows Fast-Start! · Fix your xinitrc

shaief

Member

Registered: 2014-10-29

Posts: 8

Re: Gnome shell and GDM ghosts/leftovers on screen

OK.
So currently the ghosts at GDM and Gnome-Shell stopped when i commented out:

CLUTTER_PAINT=disable-clipped-redraws:disable-culling

As described here:
https://wiki.archlinux.org/index.php/Wa … nd_crashes

Apparently it was a Wayland vs X11 issue. I wonder if someone else faced this issue as well.

I assume this solves the issue i raised here, but the weird pixel artifacts that i described here: https://superuser.com/questions/1433896 … vy-tearing still exists.