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

[Alex Deucher]

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?

Alex
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