Re: 3.14 radeon regression: radeon is broken (pci bug?)

[Andy Lutomirski]

On Fri, Mar 21, 2014 at 7:41 AM, Alex Deucher <alexdeucher@xxxxxxxxx> wrote:
> On Thu, Mar 20, 2014 at 10:17 PM, Andy Lutomirski <luto@xxxxxxxxxxxxxx> wrote:
>> My system works on a 3.13 Fedora kernel.  It does not work on a
>> more-or-less identically configured 3.14-rc7+ kernel.  The symptom is
>> that the Plymouth password prompt flashes and them the screen goes
>> blank.  Hitting escape brings back the text console, and all is well
>> until X tries to start.  Then I get a blank screen.  killall -9 Xorg
>> from ssh causes these errors to be logged:
>>
>>
>> [  226.239747] [drm:atom_op_jump] *ERROR* atombios stuck in loop for
>> more than 5secs aborting
>> [  226.239751] [drm:atom_execute_table_locked] *ERROR* atombios stuck
>> executing CD34 (len 55, WS 0, PS 0) @ 0xCD57
>> [  231.241492] [drm:atom_op_jump] *ERROR* atombios stuck in loop for
>> more than 5secs aborting
>> [  231.241496] [drm:atom_execute_table_locked] *ERROR* atombios stuck
>> executing CD6C (len 62, WS 0, PS 0) @ 0xCD88
>> [  236.243111] [drm:atom_op_jump] *ERROR* atombios stuck in loop for
>> more than 5secs aborting
>> [  236.243115] [drm:atom_execute_table_locked] *ERROR* atombios stuck
>> executing CD6C (len 62, WS 0, PS 0) @ 0xCD88
>> [  241.244625] [drm:atom_op_jump] *ERROR* atombios stuck in loop for
>> more than 5secs aborting
>> [  241.244628] [drm:atom_execute_table_locked] *ERROR* atombios stuck
>> executing CD6C (len 62, WS 0, PS 0) @ 0xCD88
>>
>>
>> lspci -vvvxxxnn on 3.14-rc7+ says:
>>
>> 09:00.0 VGA compatible controller [0300]: Advanced Micro Devices, Inc.
>> [AMD/ATI] Caicos [Radeon HD 6450/7450/8450 / R5 230 OEM] [1002:6779]
>> (rev ff) (prog-if ff)
>>     !!! Unknown header type 7f
>>     Kernel driver in use: radeon
>> 00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>> 10: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>> 20: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>> 30: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>>
>> 09:00.1 Audio device [0403]: Advanced Micro Devices, Inc. [AMD/ATI]
>> Caicos HDMI Audio [Radeon HD 6400 Series] [1002:aa98] (rev ff)
>> (prog-if ff)
>>     !!! Unknown header type 7f
>>     Kernel driver in use: snd_hda_intel
>> 00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>> 10: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>> 20: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>> 30: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>>
>> (oops!)
>>
>> On 3.13, it says:
>>
>> 09:00.0 VGA compatible controller [0300]: Advanced Micro Devices, Inc.
>> [AMD/ATI] Caicos [Radeon HD 6450/7450/8450 / R5 230 OEM] [1002:6779]
>> (prog-if 00 [VGA controller])
>>         Subsystem: PC Partner Limited / Sapphire Technology Radeon HD
>> 6450 1 GB DDR3 [174b:e164]
>>         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: 64 bytes
>>         Interrupt: pin A routed to IRQ 92
>>         Region 0: Memory at e0000000 (64-bit, prefetchable) [size=256M]
>>         Region 2: Memory at f4a20000 (64-bit, non-prefetchable) [size=128K]
>>         Region 4: I/O ports at c000 [size=256]
>>         Expansion ROM at f4a00000 [disabled] [size=128K]
>>         Capabilities: <access denied>
>>         Kernel driver in use: radeon
>> 00: 02 10 79 67 07 04 10 00 00 00 00 03 10 00 80 00
>> 10: 0c 00 00 e0 00 00 00 00 04 00 a2 f4 00 00 00 00
>> 20: 01 c0 00 00 00 00 00 00 00 00 00 00 4b 17 64 e1
>> 30: 00 00 a0 f4 50 00 00 00 00 00 00 00 0a 01 00 00
>>
>> 09:00.1 Audio device [0403]: Advanced Micro Devices, Inc. [AMD/ATI]
>> Caicos HDMI Audio [Radeon HD 6400 Series] [1002:aa98]
>>         Subsystem: PC Partner Limited / Sapphire Technology Radeon HD
>> 6450 1GB DDR3 [174b:aa98]
>>         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: 64 bytes
>>         Interrupt: pin B routed to IRQ 96
>>         Region 0: Memory at f4a40000 (64-bit, non-prefetchable) [size=16K]
>>         Capabilities: <access denied>
>>         Kernel driver in use: snd_hda_intel
>> 00: 02 10 98 aa 06 04 10 00 00 00 03 04 10 00 80 00
>> 10: 04 00 a4 f4 00 00 00 00 00 00 00 00 00 00 00 00
>> 20: 00 00 00 00 00 00 00 00 00 00 00 00 4b 17 98 aa
>> 30: 00 00 00 00 50 00 00 00 00 00 00 00 05 02 00 00
>>
>> Logs attached.
>>
>> Unfortunately, I'll be away from this computer until Wednesday.
>
> Can you bisect?

Not until Wednesday -- I don't have any way to test this remotely.  I
can do tests that don't involve rebooting, though.

>
> Alex



-- 
Andy Lutomirski
AMA Capital Management, LLC
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