linux-kernel - 3.14 radeon regression: radeon is broken (pci bug?)

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Date:	Thu, 20 Mar 2014 19:17:45 -0700
From:	Andy Lutomirski <luto@...capital.net>
To:	DRI <dri-devel@...ts.freedesktop.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>
Subject: 3.14 radeon regression: radeon is broken (pci bug?)

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.

View attachment "lspci_3.13.txt" of type "text/plain" (52681 bytes)

Download attachment "dmesg.txt.xz" of type "application/x-xz" (19368 bytes)

View attachment "lspci_3.14.txt" of type "text/plain" (51660 bytes)

View attachment "Xorg.0.log" of type "text/x-log" (47772 bytes)