Bug 117931

Summary:	Black screen after resume from hibernate on HP Pavilion dv7 with 2 AMD GPUs
Product:	Drivers	Reporter:	Eugene A. Shatokhin (eugene.shatokhin)
Component:	Video(DRI - non Intel)	Assignee:	drivers_video-dri
Status:	NEW ---
Severity:	normal	CC:	perry_yuan
Priority:	P1
Hardware:	x86-64
OS:	Linux
Kernel Version:	4.6-rc5 (mainline), 3.14.53, 4.4.7, 4.4.8 (Fedora)	Subsystem:
Regression:	No	Bisected commit-id:
Attachments:	The system log from Fedora 23 after resume. drm.debug=0x1e was set, just in case lspci -vnn Xorg.0.log after resume System log after resume (kernel 4.7) Xorg.0.log after resume (kernel 4.7) lspci -vnn (kernel 4.7)

Description Eugene A. Shatokhin 2016-05-10 09:04:28 UTC

Created attachment 215701 [details]
The system log from Fedora 23 after resume. drm.debug=0x1e was set, just in case

When the laptop resumes from hibernate, there is no output on the screen. In some cases, I can connect to the machine via SSH after that, so I can see that the system does not crash. Looks like it is just graphics that is not turned on.

The system uses 'radeon' driver.

Laptop: HP Pavilion dv7 with A8-3530MX APU
Two graphics cards:
* Radeon HD 7690M (pci:1002-6741-103c-1860)
* Radeon HD 6620G (pci:1002-9641-103c-1860)
More hardware info for that system: http://linux-hardware.org/index.php?probe=4c12fda921

OS, kernel:
I tried both ROSA R7 x86_64 with kernels 4.6-rc5 (mainline), 4.4.7, 4.1.22 and Fedora 23 with kernel 4.4.8-300.fc23.x86_64. The problem showed up with each of these.

The log below is from Fedora where I was able to connect to the machine via SSH after the problem happened.

Resuming from suspend-to-RAM works fine though.

I also tried kernel 4.1.x with the proprietary fglrx driver (v.15.201.1151) instead of 'radeon' - the graphics worked OK after resume from hibernate this time.

Comment 1 Eugene A. Shatokhin 2016-05-10 09:06:53 UTC

Created attachment 215711 [details]
lspci -vnn

Comment 2 Eugene A. Shatokhin 2016-05-10 09:07:18 UTC

Created attachment 215721 [details]
Xorg.0.log after resume

Comment 3 Eugene A. Shatokhin 2016-07-25 09:07:07 UTC

Re-checked on Fedora 23 x64 with the mainline kernel 4.7-rc7, git rev 68093c43f352, with no additional patches.

Resume from hibernation is not fully working yet but the problem looks different this time.

When I put the system to suspend-to-disk then try to resume it, the desktop environment appears this time but does not respond to keyboard, mouse, whatever.

The system log contains lots of meesages "radeon: The kernel rejected CS, see dmesg for more information.". 

Xorg.0.log ends with the following:
[  1608.239] (WW) RADEON(0): radeon_dri2_flip_event_handler: Pageflip completion event has impossible msc 78924 < target_msc 78925

I will attach the logs below.

Besides, after I have done suspend-to-ram and resumed the system (without prior reboot after the problem happened), the desktop seemed to be  operational again after a couple minutes.

Interestingly enough, lspci shows incomplete info for one of the GPUs this time (was OK with the earlier kernels):
-------------------
01:00.0 VGA compatible controller [0300]: Advanced Micro Devices, Inc. [AMD/ATI] Whistler [Radeon HD 6630M/6650M/6750M/7670M/7690M] [1002:6741] (rev ff) (prog-if ff)
	!!! Unknown header type 7f
	Kernel driver in use: radeon
	Kernel modules: radeon
-------------------
May be it is not related to the problem, may be it is.

Comment 4 Eugene A. Shatokhin 2016-07-25 09:09:35 UTC

Created attachment 225761 [details]
System log after resume (kernel 4.7)

Comment 5 Eugene A. Shatokhin 2016-07-25 09:10:09 UTC

Created attachment 225771 [details]
Xorg.0.log after resume (kernel 4.7)

Comment 6 Eugene A. Shatokhin 2016-07-25 09:10:45 UTC

Created attachment 225781 [details]
lspci -vnn (kernel 4.7)