1690223 - after update to v85.0 for Ubuntu screen corrupts in Google Sheets

Status: RESOLVED INACTIVE

(Core :: Graphics, defect, P3)

Description

[graham.lees]

Attachment: Screenshot-20210202071307-1191x855.png

User Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:85.0) Gecko/20100101 Firefox/85.0

Steps to reproduce:

Updated FF to v85.0 in Ubuntu 20.04.1 LTS.
This has only occurred in FF and only with Google Sheets. Google Sheets in Chromium performs correctly.
The screen display on the affected PC is HDMI. On a different PC with standard SVGA display, it performs correctly.

Actual results:

After the update Google Sheets screen is corrupted, pixelated (see image).

Expected results:

No screen corruptions in Google Sheets

Comment 1

[Andrew Osmond [:aosmond] (he/him)]

Could you attach your about:support so we can see your GPU info? If you disable WebRender by setting the pref gfx.webrender.force-disabled to true, and restart Firefox, do you still see the problem? Thanks!

Comment 2

[graham.lees]

Attachment: about:support details requested

Comment 3

[graham.lees]

"Could you attach your about:support so we can see your GPU info? If you disable WebRender by setting the pref gfx.webrender.force-disabled to true, and restart Firefox, do you still see the problem? Thanks!"
Answer: No, the problem disappears when setting to true and restarting FF.
I'll leave that setting as now set until you advise otherwise.
Thank you.

Comment 4

[Kestrel]

Do you still see this in the latest Nightly with WebRender enabled?

Comment 5

[graham.lees]

I set gfx.webrender.all = true in version 86.0 where I had originally set it = false and it worked correctly without screen corruption.
However... when updating FF as requested to the latest Nightly as requested it immediately corrupted the screen on ALL screens in FF not just Google Sheets and the only way to recover was to delete FF all together and re-install the snap (v86.0).
After re-install, I again set gfx.webrender.all = true and all seems fine but the beta version definitely seems to have a problem.

Comment 6

[Kestrel]

It did get worse in later versions before it was fixed. Another user with the exact same hardware and driver version (AMD RV710 20.2.6.0) reported it was fixed in latest Nightly (Bug 1689926). The snap doesn't have a Nightly version available, are you sure you tested the latest Nightly 88? Here's a direct link, extract it somewhere and run it.

Comment 7

[graham.lees]

"are you sure you tested the latest Nightly 88?"
Yes, I downloaded it from the direct link provided and extracted it as instructed.
Maybe loading the latest Nightly (apt version) over the snap interacted badly through common files in the background but as matters currently stand, I am using the snap after removing it and re-installing and it is working fine (v86).

Comment 8

[Robert Mader [:rmader]]

Graham, could you shortly confirm whether you still see his on nightly?