Bug 91161

Summary: kernel NULL pointer dereference after resume from suspend
Product: Drivers Reporter: Felix Schwarz (felix.schwarz)
Component: Video(DRI - Intel)Assignee: intel-gfx-bugs (intel-gfx-bugs)
Status: RESOLVED CODE_FIX    
Severity: normal CC: intel-gfx-bugs
Priority: P1    
Hardware: All   
OS: Linux   
Kernel Version: 3.17.8-300.fc21 Subsystem:
Regression: No Bisected commit-id:
Attachments: (hopefully) relevant log entries when I tried to resume

Description Felix Schwarz 2015-01-11 11:47:23 UTC 
Created attachment 163191 [details]
(hopefully) relevant log entries when I tried to resume

When I opened the laptop lid the system resumed but the UI was completely unresponsive: display showed old contents but no visible mouse pointer, did not react to keyboard.

It's not entirely reproducible but happens often enough to be quite annoying (I guesstimate there is a chance of 1/3). I started to notice this behavior about a month ago (about the time when 3.17 was added to Fedora).

Automated Fedora bug report is available under https://bugzilla.redhat.com/show_bug.cgi?id=1180866.
Comment 1 Felix Schwarz 2015-01-11 11:57:28 UTC 
forgot to add some info about my system:
lspci  | grep -i gm965:
00:00.0 Host bridge: Intel Corporation Mobile PM965/GM965/GL960 Memory Controller Hub (rev 0c)
00:02.0 VGA compatible controller: Intel Corporation Mobile GM965/GL960 Integrated Graphics Controller (primary) (rev 0c)
00:02.1 Display controller: Intel Corporation Mobile GM965/GL960 Integrated Graphics Controller (secondary) (rev 0c)

So, yes this chipset is somewhat aging by now but it used to work so I consider this a regression :-)
Comment 2 Felix Schwarz 2015-01-30 08:46:20 UTC 
The good news is that I don't see the issue anymore with Fedora's 3.18.3 kernel (FEDORA-2015-0937) :-)