Re: [gentoo-user] Blank screen after hibernation with radeon driver

[Fernando Rodriguez <frodriguez.developer@outlook.com>]

On Saturday, June 20, 2015 10:15:37 AM Matti Nykyri wrote:
> > On Jun 20, 2015, at 5:16, Fernando Rodriguez 
<frodriguez.developer@outlook.com> wrote:
> > 
> > Hello,
> > 
> > After switching from fglrx to the radeon driver I get a blank screen after 
> > resuming from hibernation. I can ssh in but I can't restart xorg. This 
happens 
> > with pm-utils and also with systemd. Suspend works fine with both.
> > 
> > My video card is:
> > VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Kabini 
> > [Radeon HD 8210]
> > 
> > Any suggestions?
> 
> Ssh in and run commands:
> 
> export DISPLAY=:0
> xrandr 
> Or
> xrandr --output --mode etc with right arguments
> 
> If that doesn't help, use top and perf top to see what is going on. Does 
restarting X fix te issue?

I can't restart X, it hangs when I try, xrandr also hangs. Even kill -9 
doesn't kill it. The logs sometimes don't show anything at all but today it's 
show this consistently:

un 20 18:19:08 navi kernel: [drm:cik_ring_test] *ERROR* radeon: ring 1 test 
failed (scratch(0x3010C)=0xCAFEDEAD)
Jun 20 18:19:08 navi kernel: ata1: SATA link up 6.0 Gbps (SStatus 133 SControl 
300)
Jun 20 18:19:08 navi kernel: ata1.00: configured for UDMA/133
Jun 20 18:19:08 navi kernel: [drm:cik_ring_test] *ERROR* radeon: ring 2 test 
failed (scratch(0x3010C)=0xCAFEDEAD)
Jun 20 18:19:08 navi kernel: [drm] ring test on 3 succeeded in 4 usecs
Jun 20 18:19:08 navi kernel: [drm] ring test on 4 succeeded in 4 usecs
Jun 20 18:19:08 navi kernel: [drm] ring test on 5 succeeded in 1 usecs
Jun 20 18:19:08 navi kernel: [drm] UVD initialized successfully.
Jun 20 18:19:08 navi kernel: [drm] ring test on 6 succeeded in 812 usecs
Jun 20 18:19:08 navi kernel: [drm] ring test on 7 succeeded in 3 usecs
Jun 20 18:19:08 navi kernel: [drm] VCE initialized successfully.
Jun 20 18:19:08 navi kernel: [drm] ib test on ring 0 succeeded in 0 usecs
Jun 20 18:19:08 navi kernel: [drm] ib test on ring 3 succeeded in 0 usecs
Jun 20 18:19:08 navi kernel: [drm] ib test on ring 4 succeeded in 0 usecs
Jun 20 18:19:08 navi kernel: [drm] ib test on ring 5 succeeded
Jun 20 18:19:08 navi kernel: [drm] ib test on ring 6 succeeded
Jun 20 18:19:08 navi kernel: [drm] ib test on ring 7 succeeded
Jun 20 18:19:08 navi kernel: [drm:radeon_dp_link_train_cr] *ERROR* displayport 
link status failed
Jun 20 18:19:08 navi kernel: [drm:radeon_dp_link_train_cr] *ERROR* clock 
recovery failed
Jun 20 18:19:08 navi kernel: [drm:radeon_dp_link_train_cr] *ERROR* displayport 
link status failed
Jun 20 18:19:08 navi kernel: [drm:radeon_dp_link_train_cr] *ERROR* clock 
recovery failed

--------

On one occassion there where about 20 backtraces on the log. That log is gone 
but it had a message basically saying (I don't remember the exact words) that 
something went wrong and the kernel recovered but a reboot was still needed. 
I'll post if it comes up again.

Also relevant that I've been getting this and similar errors on my logs for a 
few days (probably since I switched to the radeon driver), all the i2c devices 
are on the video card:

Jun 20 16:46:30 navi kernel: i2c i2c-7: sendbytes: error -110
Jun 20 16:46:41 navi kernel: i2c i2c-7: sendbytes: error -110
Jun 20 16:47:01 navi kernel: i2c i2c-7: sendbytes: error -110
Jun 20 16:47:11 navi kernel: i2c i2c-7: sendbytes: error -110
Jun 20 16:47:31 navi kernel: i2c i2c-7: sendbytes: error -110

-- 
Fernando Rodriguez