[Bug 76130] Radeon HD 4570 set dpm state fails after suspend

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=76130

--- Comment #8 from Adrien Prost-Boucle <adrien.prost-boucle at laposte.net> ---
Hi,

I also experience this problem with my laptop at resume from sleep. 

About log messages, there does not seem to be a message when entering sleep.
When resuming from sleep, I can briefly see this message printed on the screen:

kernel: [drm:rv730_stop_dpm [radeon]] *ERROR* Could not force DPM to low

However at boot time, I see this in the log:

kernel: [drm] initializing kernel modesetting (RV710 0x1002:0x9553
0x1179:0xFF00).

I see a switch from rv710 to rv730, is this normal?
Previously, Thaddäus Tintenfisch reported a switch from rv730 to rv770...

If useful, the lspci command says:

01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI]
RV710/M92 [Mobility Radeon HD 4530/4570/545v]
01:00.1 Audio device: Advanced Micro Devices, Inc. [AMD/ATI] RV710/730 HDMI
Audio [Radeon HD 4000 series]

The patch proposed just before seems to be explicitely related to rv770, which
does not seem to be my case.

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