Bug 192471

Summary:	Suspend broken on Thinkpad P50 in 4.8 kernels
Product:	Power Management	Reporter:	Guillaume Martres (smarter3)
Component:	Hibernation/Suspend	Assignee:	Rafael J. Wysocki (rjw)
Status:	RESOLVED CODE_FIX
Severity:	normal	CC:	yu.c.chen
Priority:	P1
Hardware:	Intel
OS:	Linux
Kernel Version:	4.8.9-4.8.17	Subsystem:
Regression:	Yes	Bisected commit-id:

Description Guillaume Martres 2017-01-12 19:04:16 UTC

Suspending to ram and to disk works perfectly fine on kernel 4.8.8 and on 4.10-rc3. But with 4.8.9 (and still with 4.8.17 which is the latest 4.8 kernel) it works some of the time, but most of the time it freezes the machine. When the machine is frozen the screen is turned off, the power button light is on, but the machine does not respond to any input including the Magic SysRq keys, the only thing that can be done is powering off the machine by pressing the power button for 10 seconds. This happens both with suspend-to-ram and suspend-to-disk.

Originally reported on the Ubuntu bug tracker which contains some logs from my machine: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1655065

Comment 1 Chen Yu 2017-01-16 02:21:44 UTC

I assume this should be a issue in ubuntu distr, right? as it does not appear in 4.10-rc3 anymore. I'm closing this thread in bugzilla and please track the issue in the link above, and a bisect would be a direct way to find the bad commit.