Bug 204345

Summary: Unigine Superposition hard locks the PC since 5.1.18 (and possibly before)
Product: Drivers Reporter: Joaquin Otsoa (edisonalvaringo)
Component: Video(DRI - non Intel)Assignee: drivers_video-dri
Status: RESOLVED INVALID    
Severity: normal    
Priority: P1    
Hardware: x86-64   
OS: Linux   
Kernel Version: 5.1.20 Subsystem:
Regression: No Bisected commit-id:

Description Joaquin Otsoa 2019-07-28 02:08:58 UTC 
At first glance I though it was an Overclocking problem because I oc my hardware just slightly. But no even with no OCing, zero, nada... since 5.1.18 Unigine benchmark crashes. It is really unstable 90% of the times it will crash when it's about to display the final results, on 5.1.20 is even worse and it gets crazy because fps drop really hard. If you are really luck it will finish. I have tried 5.1.18/19 and 20. 5.0.20 doesn't not have this bug. I will try to investigate further to at least know which is the precise point release when this bug was introduced.
Comment 1 Joaquin Otsoa 2019-07-28 02:11:23 UTC 
This is with Linux Mint (Ubuntu 18.04.2 LTS really) I forgot to mention that this is with the liquorix kernel, maybe I should try with vanilla kernel first.
Comment 2 Joaquin Otsoa 2019-07-28 02:34:22 UTC 
With ubuntu ppa vanilla kernel this happens as well.
Comment 3 Joaquin Otsoa 2019-07-28 02:46:08 UTC 
I should be more precise it doesn't crash really it hard locks the pc completely only the reset button will fix the problem.
Comment 4 Joaquin Otsoa 2019-07-28 03:21:57 UTC 
interesting, kernel 5.2.3 doesn't hard lock the PC, but fps drop, abnormally (like with 5.1.20) but when looking at the final results, it's not that bad, about 5% performance hit.
Comment 5 Joaquin Otsoa 2019-07-28 04:04:01 UTC 
unfortunately the bug was introduced in 5.1.0 so this is going to take thousands of commits, I'll do my best.
Comment 6 Joaquin Otsoa 2019-07-28 04:50:56 UTC 
it doesn't happen with 4.19.61 lts. I think it will be easier to check all the 5.1 rc and check when this was introduced.
Comment 7 Jani Nikula 2019-08-21 09:47:15 UTC 
What hardware?
Comment 8 Joaquin Otsoa 2019-08-21 20:55:13 UTC 
I'm gonna close this because the regression on the 5.2 are fixed now performs even better than the 5.1 branch. And fixing the 5.1 branch makes no sense because it has reached EOL.