** Description changed:
+
+ SRU Justification:
+
+ [Impact]
+ System hang when stress S3 more than 90 times.
+
+ [Fix]
+ Upstream kernel is good, after bisecting, bad commit is a Ubuntu sauce
+ patch: "vfio -- release device lock before userspace requests"
+ 5.8 kernel got this fix.
+ 5.4 kernel got this commit by stable update LP:#1888560
+
+ [Test Case]
+ Verified for 500 times of S3, system runs good.
+
+ [Regression Potential]
+ Low
+ uptream fix for specific commit, verified with postive result.
+
+
+ ==================================================
[Summary]
System got hang during executing the S3-30-cycle test case.
[Steps to reproduce]
$ sudo checkbox-support-fwts_test -l /home/u/suspend_30_cycles -f none -s s3
--s3-device-check --s3-device-check-delay=60 --s3-sleep-delay=60
--s3-multiple=30
[Expected result]
The test script should be finished smoothly.
[Actual result]
System got hang at the 7th or 8th S3 resumed back.
[Failure rate]
100%
[Additional information]
CPU: Intel(R) Core(TM) i5-10600 CPU @ 3.30GHz (12x)
GPU: 00:02.0 Display controller [0380]: Intel Corporation Device [8086:9bc8]
01:00.0 VGA compatible controller [0300]: Advanced Micro Devices, Inc.
[AMD/ATI] Oland [Radeon HD 8570 / R7 240/340 OEM] [1002:6611] (rev 87)
kernel-version: 5.6.0-1020-oem
** Also affects: linux (Ubuntu Focal)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1893609
Title:
System hang when stress S3 on radeon with TTM
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