** Changed in: hwe-next
Status: New => Fix Released
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Title:
System randomly hangs during suspend when mei_wdt is loaded
** Tags added: cscc
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Title:
System randomly hangs during suspend when mei_wdt is loaded
Status in HWE Next:
New
Status in linux
This bug was fixed in the package linux - 4.15.0-43.46
---
linux (4.15.0-43.46) bionic; urgency=medium
* linux: 4.15.0-43.46 -proposed tracker (LP: #1806659)
* System randomly hangs during suspend when mei_wdt is loaded (LP: #1803942)
- SAUCE: base/dd: limit release function
With the proposed kernel, my system passed a 30-run stress.
1. Enable the -proposed repository
2. Install the proposed kernel and reboot
3. uname -r
4.15.0-43-generic
4. sudo modprobe mei_wdt
5. for s in $(seq 30); do sudo rtcwake -v -m mem -s 15; sleep 15; done
6. verify the result is success
This bug is awaiting verification that the kernel in -proposed solves
the problem. Please test the kernel and update this bug with the
results. If the problem is solved, change the tag 'verification-needed-
bionic' to 'verification-done-bionic'. If the problem still exists,
change the tag
** Changed in: linux (Ubuntu Bionic)
Status: Triaged => Fix Committed
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Title:
System randomly hangs during suspend when
This is caused by 876dcb relies on dev->driver to tell if
__device_release_driver() was completed by other callers while calling
remove(). But drivers like mei_wdt will set dev->driver to NULL after
its remove() completes, thus it would do return instead of continuing
__device_release_driver().
** Changed in: linux (Ubuntu)
Importance: Undecided => Medium
** Changed in: linux (Ubuntu)
Status: Confirmed => Triaged
** Also affects: linux (Ubuntu Bionic)
Importance: Undecided
Status: New
** Changed in: linux (Ubuntu Bionic)
Status: New => Triaged
** Changed
** Tags added: dawson originate-from-1803076
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Title:
System randomly hangs during suspend when mei_wdt is loaded
Status in HWE
I commented out this patch of 876dcb and cannot reproduce the issue
afterward.
diff --git a/drivers/base/dd.c b/drivers/base/dd.c
index 2c964f5..37c0105 100644
--- a/drivers/base/dd.c
+++ b/drivers/base/dd.c
@@ -868,6 +868,13 @@ static void __device_release_driver(struct device *dev,
struct
** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
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Title:
System randomly hangs during suspend when mei_wdt is
I tried mainline kernel 4.20-rc2, 4.18, 4.17, 4.16 and 4.15. They all passed a
50 run test.
To validate when the issue is introduced, I installed several Ubuntu kernel
packages and address the issue/regression happens between 4.15.0-34 and
4.15.0-36.
Finished the kernel bisect and probably
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