Bug#676360: nouveau: PFIFO_CACHE_ERROR - Ch 0/7

[Sergio Gelato]

* Jonathan Nieder [2012-06-06 11:30:00 -0500]:
 Please test 3.4.1 from experimental (it should finish building and
 show up at incoming.debian.org soon[1]).
 
 Hope that helps,

Sorry to disappoint you. That 3.4.1-1~experimental.1 build
(3.4-trunk-686-pae #1 SMP Wed Jun 6 15:11:31 UTC 2012 i686 GNU/Linux)
is even less well-behaved under Xen: I'm getting a kernel OOPS at
EIP: [c1168e54] atomic64_read_cx8+0x4/0xc SS:ESP e021:ca853c6c
The top of the trace message unfortunately scrolled off the console before I
could see it, and the message doesn't have time to make it to syslog (either
local or remote).

An interesting twist: the trace is timestamped 0.776065 but there is exactly
one more message on the console at 1.344071 before the system hangs:
Refined TSC clocksource calibration: 3191.999 MHz.
(This is indeed a 3.2 GHz CPU.)

Non-Xen boots proceed normally.

Feel free to split this bug report since this new OOPS is clearly unrelated
to the nouveau issue (it happens even when the nouveau module is blacklisted);
I only mention it here because it's preventing me from checking whether the
problem with nouveau is still present.



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Bug#676360: nouveau: PFIFO_CACHE_ERROR - Ch 0/7

[Sergio Gelato]

Package: linux-image-3.2.0-2-686-pae
Version: 3.2.18-1

On a fresh wheezy install I got a flood (~ 50 kHz) of messages of the following
type:

Jun  5 09:54:17 hostname kernel: [   14.410948] [drm] nouveau :01:00.0: 
PFIFO_CACHE_ERROR - Ch 0/7 Mthd 0x1470 Data 0x4956cc77
Jun  5 09:54:17 hostname kernel: [   14.410969] [drm] nouveau :01:00.0: 
PFIFO_CACHE_ERROR - Ch 0/7 Mthd 0x1474 Data 0x204f4544
Jun  5 09:54:17 hostname kernel: [   14.410989] [drm] nouveau :01:00.0: 
PFIFO_CACHE_ERROR - Ch 0/7 Mthd 0x1478 Data 0x000d
Jun  5 09:54:17 hostname kernel: [   14.411009] [drm] nouveau :01:00.0: 
PFIFO_CACHE_ERROR - Ch 0/7 Mthd 0x147c Data 0x0d260138
Jun  5 09:54:17 hostname kernel: [   14.411029] [drm] nouveau :01:00.0: 
PFIFO_CACHE_ERROR - Ch 0/7 Mthd 0x1480 Data 0x4249
Jun  5 09:54:17 hostname kernel: [   14.411049] [drm] nouveau :01:00.0: 
PFIFO_CACHE_ERROR - Ch 0/7 Mthd 0x1484 Data 0x4756204d

when booting as a Xen 4.1 dom0. The console displays old content from a 
previous, non-Xen boot instead of the expected boot messages and login
prompt.

Workaround (successfully tested): blacklist nouveau in /etc/modprobe.d/.

Some hardware information:
# lspci -nnvv -s 01:00.0
01:00.0 VGA compatible controller [0300]: NVIDIA Corporation NV34 [GeForce FX 
5200] [10de:0322] (rev a1) (prog-if 00 [VGA controller])
Subsystem: NVIDIA Corporation Device [10de:01b9]
Control: I/O+ Mem+ BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr- 
Stepping- SERR- FastB2B- DisINTx-
Status: Cap+ 66MHz+ UDF- FastB2B+ ParErr- DEVSEL=medium TAbort- 
TAbort- MAbort- SERR- PERR- INTx-
Interrupt: pin A routed to IRQ 11
Region 0: Memory at fd00 (32-bit, non-prefetchable) [size=16M]
Region 1: Memory at f000 (32-bit, prefetchable) [size=128M]
Expansion ROM at fea0 [disabled] [size=128K]
Capabilities: [60] Power Management version 2
Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA 
PME(D0-,D1-,D2-,D3hot-,D3cold-)
Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME-
Capabilities: [44] AGP version 3.0
Status: RQ=32 Iso- ArqSz=0 Cal=3 SBA+ ITACoh- GART64- HTrans- 
64bit- FW+ AGP3+ Rate=x4,x8
Command: RQ=1 ArqSz=0 Cal=0 SBA- AGP- GART64- 64bit- FW- 
Rate=none

Kernel version:
[0.00] Linux version 3.2.0-2-686-pae (Debian 3.2.18-1) 
(debian-kernel@lists.debian.org) (gcc version 4.6.3 (Debian 4.6.3-5) ) #1 SMP 
Mon May 21 18:24:12 UTC 2012

Xen version:
(XEN) Xen version 4.1.2 (Debian 4.1.2-6) (wa...@debian.org) (gcc version 4.6.3 
(Debian 4.6.3-5) ) Sun May  6 18:55:17 UTC 2012
(XEN) Bootloader: GRUB 1.99-21
(XEN) Command line: placeholder
(XEN) Video information:
(XEN)  VGA is text mode 80x25, font 8x16
(XEN)  VBE/DDC methods: V2; EDID transfer time: 1 seconds

nouveau-related messages in a non-Xen boot:
Jun  5 09:05:08 hostname kernel: [7.424742] nouveau :01:00.0: PCI INT A 
- GSI 16 (level, low) - IRQ 16
Jun  5 09:05:08 hostname kernel: [7.426597] [drm] nouveau :01:00.0: 
Detected an NV30 generation card (0x034200a2)
Jun  5 09:05:08 hostname kernel: [7.426781] [drm] nouveau :01:00.0: 
Attempting to load BIOS image from PRAMIN
Jun  5 09:05:08 hostname kernel: [7.470839] [drm] nouveau :01:00.0: ... 
appears to be valid
Jun  5 09:05:08 hostname kernel: [7.471109] [drm] nouveau :01:00.0: BMP 
BIOS found
Jun  5 09:05:08 hostname kernel: [7.471112] [drm] nouveau :01:00.0: BMP 
version 5.39
Jun  5 09:05:08 hostname kernel: [7.471115] [drm] nouveau :01:00.0: 
Bios version 04.34.20.22
Jun  5 09:05:08 hostname kernel: [7.471118] [drm] nouveau :01:00.0: 
Found Display Configuration Block version 2.2
Jun  5 09:05:08 hostname kernel: [7.471123] [drm] nouveau :01:00.0: Raw 
DCB entry 0: 01000300 88b8
Jun  5 09:05:08 hostname kernel: [7.471126] [drm] nouveau :01:00.0: Raw 
DCB entry 1: 02010310 88b8
Jun  5 09:05:08 hostname kernel: [7.471129] [drm] nouveau :01:00.0: Raw 
DCB entry 2: 01010312 
Jun  5 09:05:08 hostname kernel: [7.471132] [drm] nouveau :01:00.0: Raw 
DCB entry 3: 02020321 0003
Jun  5 09:05:08 hostname kernel: [7.471319] [drm] nouveau :01:00.0: 
Loading NV17 power sequencing microcode
Jun  5 09:05:08 hostname kernel: [7.471323] [drm] nouveau :01:00.0: 
Parsing VBIOS init table 0 at offset 0xE947
Jun  5 09:05:08 hostname kernel: [7.473347] [drm] nouveau :01:00.0: 
Parsing VBIOS init table 1 at offset 0xEB87
Jun  5 09:05:08 hostname kernel: [7.473356] [drm] nouveau :01:00.0: 
Parsing VBIOS init table 2 at offset 0xECCD
Jun  5 09:05:08 hostname kernel: [7.473392] [drm] nouveau :01:00.0: 
Parsing VBIOS init table 3 at offset 0xEE53
Jun  5 09:05:08 hostname kernel: [7.473396] [drm] nouveau :01:00.0: 
Parsing VBIOS init table 4 at offset 0xEE70
Jun  5 09:05:08 hostname kernel: [7.473401] [drm] nouveau :01:00.0: 

Bug#676360: nouveau: PFIFO_CACHE_ERROR - Ch 0/7

[Jonathan Nieder]

Hi Sergio,

Sergio Gelato wrote:

 On a fresh wheezy install I got a flood (~ 50 kHz) of messages of the 
 following
 type:
[...]
 [drm] nouveau :01:00.0: PFIFO_CACHE_ERROR - Ch 0/7 Mthd 0x1470 Data 
 0x4956cc77
[...]
 when booting as a Xen 4.1 dom0. The console displays old content from a 
 previous, non-Xen boot instead of the expected boot messages and login
 prompt.

Yep, there have been some fixes recently that seem vaguely related.

Please test 3.4.1 from experimental (it should finish building and
show up at incoming.debian.org soon[1]).

Hope that helps,
Jonathan

[1] https://buildd.debian.org/status/package.php?p=linux-2.6suite=experimental



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