UI drawing artifacts on Mesa after recent commit. #78803

New Issue

Omar Emara · 2020-07-10T19:04:35+02:00

Omar Emara commented

2020-07-10 19:04:35 +02:00

System Information
Operating system: Linux + Mesa
Graphics card: AMD HD5450

Blender Version
This issue was introduced in 630c6226e2.

Short description of error

Triangle-like artifacts appears in the UI. Viewport seems unaffected.

**System Information** Operating system: Linux + Mesa Graphics card: AMD HD5450 **Blender Version** This issue was introduced in 630c6226e29444113950d1073175fdf1723fbe34. **Short description of error** Triangle-like artifacts appears in the UI. Viewport seems unaffected. ![20200710-190050.png](https://archive.blender.org/developer/F8684200/20200710-190050.png)

Omar Emara commented

2020-07-10 19:04:35 +02:00

Added subscriber: @OmarEmaraDev

blender-admin commented

2020-07-10 19:04:35 +02:00

#87108 was marked as duplicate of this issue

Ankit Meel commented

2020-07-10 21:41:27 +02:00

Added subscribers: @fclem, @ankitm

Ankit Meel commented

2020-07-10 21:41:27 +02:00

@fclem Looks like Mesa is not happy with the fix for macOS glitches in the UI.
630c6226e2

@OmarEmaraDev Please add system info.txt.

@fclem Looks like Mesa is not happy with the fix for macOS glitches in the UI. 630c6226e2 @OmarEmaraDev Please add system info.txt.

Omar Emara commented

2020-07-10 21:49:46 +02:00

system-info.txt

[system-info.txt](https://archive.blender.org/developer/F8684532/system-info.txt)

Ankit Meel commented

2020-07-10 23:05:56 +02:00

Changed status from 'Needs Triage' to: 'Confirmed'

Ankit Meel commented

2020-07-10 23:05:56 +02:00

Keeping Mesa glitch separate from Catalina + Intel HD 6xx issues in #78307 (Drawing artifacts in the Blender UI on macOS)

Ankit Meel commented

2020-07-24 20:54:41 +02:00

Changing status since this is being worked upon, & #78307 is a 2.90 release target too.
3886392430

Changing status since this is being worked upon, & #78307 is a 2.90 release target too. 3886392430

Ankit Meel commented

2020-07-25 20:47:36 +02:00

@OmarEmaraDev Could you retry on latest build ? {388639243053} has been reported to have fixed the issue on macOS at least.

Omar Emara commented

2020-07-25 20:58:53 +02:00

@ankitm The problem is still there. Compiled at 1e999c7bdb.

@ankitm The problem is still there. Compiled at 1e999c7bdb63576fd66815c1770d096d165b8281.

Ankit Meel commented

2020-07-26 08:07:51 +02:00

Added subscriber: @Sergey

Ankit Meel commented

2020-07-26 08:07:51 +02:00

In #78803#985113, @OmarEmaraDev wrote:
@ankitm The problem is still there. Compiled at 1e999c7bdb.

@Sergey {388639243053} is not working for Mesa + AMD setup. It fixed the macOS + intel issues though.

> In #78803#985113, @OmarEmaraDev wrote: > @ankitm The problem is still there. Compiled at 1e999c7bdb63576fd66815c1770d096d165b8281. @Sergey {388639243053} is not working for Mesa + AMD setup. It fixed the macOS + intel issues though.

Sergey Sharybin commented

2020-07-26 10:47:19 +02:00

Can you explain a bit more what exactly you mean by "is not working for Mesa + AMD setup" ?
Is the commit did not fix the problem? Did the change made things worse?

Can you explain a bit more what exactly you mean by "is not working for Mesa + AMD setup" ? Is the commit did not fix the problem? Did the change made things worse?

Ankit Meel commented

2020-07-26 10:52:10 +02:00

It was also reported that certain AMD and Mesa driver suffer from similar issue, so disabled instancing for this configuration as well.

Isn't this line indicating that 3886392430 should've fixed the problem reported in this report ? If so, it didn't fix it, as Omar said. The problem here was introduced in 630c6226e2.
I don't have AMD gpu or mesa driver to test if it made things worse.

> It was also reported that certain AMD and Mesa driver suffer from similar issue, so disabled instancing for this configuration as well. Isn't this line indicating that 388639243053 should've fixed the problem reported in this report ? If so, it didn't fix it, as Omar said. The problem here was introduced in 630c6226e294. I don't have AMD gpu or mesa driver to test if it made things worse.

Omar Emara commented

2020-07-26 13:51:51 +02:00

Disabling the back-end SB shader optimizer fixes the issue. So perhaps the best option would be to report that to Mesa. Gert Wollny of the R600 team have the same GPU I have, so maybe he can help fix this upstream. What do you think?

Clément Foucault commented

2020-07-26 17:24:02 +02:00

@OmarEmaraDev Or maybe he could give us a hint on what triggers the issue. This way we could have a real fix for MacOS and Mesa.

Omar Emara commented

2020-07-31 13:43:30 +02:00

Apparently the SB backend is no longer maintained and will be superseded by an NIR backend. Mesa developers suggested we disable the SB backend R600_DEBUG=nosb as a workaround until the NIR path is mature enough to be used. Since this only affects the R600/SB path that is not officially supported by Blender, I guess we can close this and maybe mention the workaround somewhere.

https://gitlab.freedesktop.org/mesa/mesa/-/issues/3330

Apparently the SB backend is no longer maintained and will be superseded by an NIR backend. Mesa developers suggested we disable the SB backend `R600_DEBUG=nosb` as a workaround until the NIR path is mature enough to be used. Since this only affects the R600/SB path that is not officially supported by Blender, I guess we can close this and maybe mention the workaround somewhere. https://gitlab.freedesktop.org/mesa/mesa/-/issues/3330

Evan Wilson commented

2021-04-01 09:20:58 +02:00

Added subscriber: @maslobojik

Omar Emara commented

2021-04-13 22:33:57 +02:00

Changed status from 'Confirmed' to: 'Resolved'

Omar Emara closed this issue

2021-04-13 22:33:57 +02:00

Omar Emara self-assigned this 2021-04-13 22:33:57 +02:00

blender-admin commented

2021-04-13 22:36:24 +02:00

This issue was referenced by d63b72e9f9

This issue was referenced by d63b72e9f9305ac275584e801244741f2a14e5d3

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UI drawing artifacts on Mesa after recent commit. #78803