Hi Alex,

Your commit 9349d5cc920c10845693f906ebd67f394f1d0d04
(drm/radeon/kms/pm: enable SetVoltage on r7xx/evergreen) has caused my test-bed
Acer Ferrari One to behave quite unreliably.  The symptoms are:

- the system hangs hard (~ 50% of the time) when starting Xorg
- the system hangs hard (~ 50% of the time) when stopping Xorg during system
  reboot
- the system sometimes hangs hard during suspend to RAM

These problems are not reproducible with the commit above reverted.

Below is the information about the graphics adapter from lspci.

Rafael



01:05.0 VGA compatible controller: ATI Technologies Inc RS780M/RS780MN [Radeon 
HD 3200 Graphics] (prog-if 00 [VGA controller])
        Subsystem: Acer Incorporated [ALI] Device 029e
        Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- 
Stepping- SERR- FastB2B- DisINTx-
        Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- 
<MAbort- >SERR- <PERR- INTx-
        Latency: 0, Cache Line Size: 32 bytes
        Interrupt: pin A routed to IRQ 18
        Region 0: Memory at a0000000 (32-bit, prefetchable) [size=256M]
        Region 1: I/O ports at 9000 [size=256]
        Region 2: Memory at 9fdf0000 (32-bit, non-prefetchable) [size=64K]
        Region 5: Memory at 9fe00000 (32-bit, non-prefetchable) [size=1M]
        Expansion ROM at <unassigned> [disabled]
        Capabilities: [50] Power Management version 3
                Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=0mA 
PME(D0-,D1-,D2-,D3hot-,D3cold-)
                Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME-
        Capabilities: [a0] MSI: Enable- Count=1/1 Maskable- 64bit+
                Address: 0000000000000000  Data: 0000
        Kernel driver in use: radeon

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