Bug 101966 - [945gm v4.9] System hangs after resume from hibernate (S4) on eM250 running kernel 4.9.38 and i915 module
Summary: [945gm v4.9] System hangs after resume from hibernate (S4) on eM250 running k...
Status: CLOSED FIXED
Alias: None
Product: DRI
Classification: Unclassified
Component: DRM/Intel (show other bugs)
Version: DRI git
Hardware: x86 (IA32) Linux (All)
: medium normal
Assignee: Intel GFX Bugs mailing list
QA Contact: Intel GFX Bugs mailing list
URL:
Whiteboard:
Keywords:
Depends on:
Blocks:
 
Reported: 2017-07-29 04:32 UTC by David Allen
Modified: 2017-08-01 14:06 UTC (History)
1 user (show)

See Also:
i915 platform: I945GM
i915 features:

Attachments
dmesg before hibernation (75.04 KB, text/plain)
2017-07-29 04:32 UTC, David Allen 		no flags Details
dmesg after resume (77.91 KB, text/plain)
2017-07-29 04:34 UTC, David Allen 		no flags Details
intel_reg_dumper output before hibernation (13.12 KB, text/plain)
2017-07-29 04:36 UTC, David Allen 		no flags Details
intel_reg_dumper output after resume but prior to loading i915 module (13.15 KB, text/plain)
2017-07-29 04:38 UTC, David Allen 		no flags Details
View All

Description David Allen 2017-07-29 04:32:34 UTC 
Created attachment 133110 [details]
dmesg before hibernation

This bug appears to be similar to #99669.
On resume from hibernate, after the messages about progress of the image loading process, the display goes blank and the system is unresponsive, forcing a hard power reset to restart.

I have found that if I do 'rmmod -f i915' prior to hibernation, then I can blindly do 'modprobe i915' after resume and the display returns.

I am attaching four files created when executing
'intel_reg_dumper > ird_before; rmmod -f i915; dmesg > dmesg_before; echo disk > /sys/power/state; dmesg > dmesg_after; intel_reg_dumper > ird_after; modprobe i915'
Comment 1 David Allen 2017-07-29 04:34:16 UTC 
Created attachment 133111 [details]
dmesg after resume
Comment 2 David Allen 2017-07-29 04:36:33 UTC 
Created attachment 133113 [details]
intel_reg_dumper output before hibernation
Comment 3 David Allen 2017-07-29 04:38:32 UTC 
Created attachment 133115 [details]
intel_reg_dumper output after resume but prior to loading i915 module
Comment 4 Chris Wilson 2017-07-29 09:48:37 UTC 
Please try to reproduce on v4.12 and/or drm-tip [https://cgit.freedesktop.org/drm-tip].
Comment 5 David Allen 2017-07-29 13:25:27 UTC 
I can confirm that resume from hibernate to run level 3 and also to graphical run level works after upgrade to kernel 4.12.4

Thanks for the quick response and suggestion. My apologies for the noise.

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