Gala: Graphical glitches when resuming from suspension

[SamCarlberg]

This has been an off-and-on problem for me. Generally it seems to be fixed (or broken) every few months by OS updates from AppCenter

Desktop view

Look at the corners; there are small ~6px squares in each corner filled with noise

And this occasionally happens to the desktop:

Multitasking view

Don't know what's happening here. If Gala is tiling the same image for the background, it might be reading from junk memory after resuming.

[kmf]

I have similar issues, after I lock my screen and unlock again,

https://www.reddit.com/r/elementaryos/comments/6dxx67/disappearing_login_sessions_when_locked/

Run sudo -i scratch-text-editor /etc/default/acpi-support
Find and change POST_VIDEO=true to POST_VIDEO=false
Find and change SAVE_VBE_STATE=true to SAVE_VBE_STATE=false
Restart your laptop, issue should be solved.

[kmf]

could resolve it with a

gala --replace

[Nine-H]

I've had this issue on my PC's nvidia card, but haven't seen it on my intel laptop.

[peteruithoven]

@kmf How would you recommend running that?
I noticed that when I try that from the Terminal it's running "in the foreground", meaning you can't use that terminal anymore and can't close it.
I would recommend running it from the Applications menu.

Relevant Stack overflow question: https://elementaryos.stackexchange.com/questions/8952/artifacts-in-background (which has many duplicates)

[peteruithoven]

@kmf, that reddit topic you mention is about people losing their session, are you sure that's relevant for this issue? Has the workaround that was shared there and you share here helped with this issue?

[kmf]

@peteruithoven ...
perhaps in a screen session?

I'm not sure if it's related ... but what is consistent is NVIDIA cards ...

[itoshkov]

You just need to add ampersand & at the end of the line:

gala -r &

This tells the shell to run the command at the background. It works fine for me, but if for some reason gala continues to die after you close the terminal, you can do the following:

nohup gala -r &

nohup catches and ignores the hang-up signal, that is otherwise sent to gala.

One problem is that after I restart gala, the wingpanel doesn't turn black for maximized windows. To fix this I just need to kill it and it gets restarted automatically:

pkill wingpanel

[omouren]

Same here with NVIDIA card

[jlnr]

I think I've fixed this for Juno in #330, does anyone with an Nvidia card want to test these changes?

(gala --replace stopped working for me, so I've had to sudo ninja install my branch and reboot; YMMV.)

[cassidyjames]

@jlnr that appears to fix it for me here with an NVIDIA GTX 1050Ti and the proprietary drivers. Awesome!

[MauricioFIUBA]

Is there any progress with this bug?

[cassidyjames]

Fixed by https://github.com/elementary/gala/pull/330

[Austint30]

I still have this issue in Juno.

[donadigo]

@Austint30 it's closed because it was merged to master but not released as an update yet, so wait a little bit for that.

[Austint30]

@donadigo Thanks for the info. I'll wait patiently. :)

[seesemichaelj]

There was a gala release on 12/17/2018: 0.3.2~r679+pkg45~ubuntu5.0.1. Are we expecting this issue to be fixed? If so, I'm still experiencing it. I'm not sure how the "release schedule/process" works. But I did verify I have that version installed.

[itoshkov]

There was a gala release on 12/17/2018: 0.3.2~r679+pkg45~ubuntu5.0.1. Are we expecting this issue to be fixed? If so, I'm still experiencing it. I'm not sure how the "release schedule/process" works. But I did verify I have that version installed.

I haven't experienced it since I installed Juno on the same hardware and with NVidia proprietary drivers.

[tdias25]

this still happens to me

elementary OS 5.1.7 Hera
Nitro 5 Laptop - gtx 1650

[aalfiann]

Yes this still happend to me..

Elementary OS 5.1.7 Hera
Nvidia MX130
nvidia-driver-455
Asus Vivobook A407UF

[relaxed-dev]

This still happens to me after a suspend, in my case the machine was suspended all night and in the morning this issue occurred, it wasn't just the wallpaper either, it was also the wingpanel that had the artifacts. The issue is gone now since I've woken the pc, it reappeared after I rebooted as well (only for a short time, now it's completely gone). It was slightly scary, I thought my GPU was dead or something.

[itoshkov]

This still happens to me after a suspend, in my case the machine was suspended all night and in the morning this issue occurred, it wasn't just the wallpaper either, it was also the wingpanel that had the artifacts. The issue is gone now since I've woken the pc, it reappeared after I rebooted as well (only for a short time, now it's completely gone).

Does the workaround described here help?

[relaxed-dev]

Will have to try it when the issue arises again. Although the issue was gone I executed the command to restart the wm.