Page MenuHome
Create Task
Maniphest T70187

Segmentation fault with edit mode operation
Closed, ResolvedPublic
Actions

Description

System Information
Operating system: Linux-5.0.0-29-generic-x86_64-with-Ubuntu-19.04-disco 64 Bits
Graphics card: Radeon RX 580 Series (POLARIS10, DRM 3.33.0, 5.0.0-29-generic, LLVM 8.0.0) X.Org 4.5 (Core Profile) Mesa 19.0.8

Blender Version
Broken: version: 2.81 (sub 12), branch: master, commit date: 2019-09-23 15:03, hash: rB2713921e8ac9
Worked: 2.81 (sub 8), branch: master (modified), commit date: 2019-09-08 16:45, hash: rB7ab936c5b9e1

Short description of error
Segmentation fault

Exact steps for others to reproduce the error
With the default cube, enter edit mode and try to merge vertices with Alt+M
Options At Center; At Cursor and Collapse crashes Blender

blender.crash.txt1 KBDownload

Revisions and Commits

rB Blender
D5886rBf8da7218be13 Fix T70187: GPU Driver: Merge Vertices Crashes ATI/Linux/OpenSource

Related Objects

Event Timeline

Rey Leonard M. Amorato (rl.amorato) created this task.Sep 23 2019, 7:05 PM
Philipp Oeser (lichtwerk) lowered the priority of this task from 90 to 80.Sep 24 2019, 1:10 PM
Philipp Oeser (lichtwerk) added subscribers: Clément Foucault (fclem), Jeroen Bakker (jbakker), Philipp Oeser (lichtwerk).

Looks like a crash in the GPU driver.

@Rey Leonard M. Amorato (rl.amorato) : I assume you tested this with File → Defaults → Load Factory Settings?
@Jeroen Bakker (jbakker), @Clément Foucault (fclem): does this ring a bell?

Jeroen Bakker (jbakker) added a comment.EditedSep 24 2019, 1:50 PM

Mesa 19.0.8 is really flaky. @Rey Leonard M. Amorato (rl.amorato) Can you update to the latest drivers of your distribution?
I am able to reproduce this on a machine here. Will investigate in more depth what the actual issue in the driver is.

Philipp Oeser (lichtwerk) lowered the priority of this task from 80 to 30.Sep 24 2019, 1:52 PM
Jeroen Bakker (jbakker) added a comment.Sep 24 2019, 2:33 PM

With the --debug-gpu-force-workarounds it does not crash for me.
I will see what workaround is needed and enable this one for this specific configuration.

Jeroen Bakker (jbakker) added a revision: D5886: Fix T70187: GPU Driver: Merge Vertices Crashes ATI/Linux/OpenSource .Sep 24 2019, 3:24 PM
Rey Leonard M. Amorato (rl.amorato) added a comment.Sep 24 2019, 5:56 PM

@Philipp Oeser (lichtwerk) Yes, this is with Factory Settings.
@Jeroen Bakker (jbakker) I believe 19.0.8 is the latest for Ubuntu 19.04... Trying 19.3 using a PPA caused my Desktop to fall into a login loop.
No crash with --debug-gpu-force-workarounds too.

Upon further testing, it seems it crashes when the mesh does not have enough vertices to sustain a face.

Rey Leonard M. Amorato (rl.amorato) updated the task description. (Show Details)Sep 24 2019, 5:58 PM
noki paike (amonpaike) added a subscriber: noki paike (amonpaike).EditedSep 25 2019, 5:52 AM

^___^
guys, I've been trying for weeks to tell you that AMD GPUs work better on linux with workarounds

https://developer.blender.org/rBd0c772f68b84267e15630064fc21cc54fc7209f0#246612

I await debugging those fluorescent and inverted lights (on my gpu)
otherwise I am forced to use blender with half the performance on linux

Jeroen Bakker (jbakker) mentioned this in T70209: Can not open Blender 2.81.12 under Ubuntu 18.04.3 LTS.Sep 25 2019, 8:15 AM
Jeroen Bakker (jbakker) changed the task status from Unknown Status to Resolved by committing rBf8da7218be13: Fix T70187: GPU Driver: Merge Vertices Crashes ATI/Linux/OpenSource.Sep 25 2019, 3:58 PM
Jeroen Bakker (jbakker) claimed this task.
Jeroen Bakker (jbakker) added a commit: rBf8da7218be13: Fix T70187: GPU Driver: Merge Vertices Crashes ATI/Linux/OpenSource.