Bug 81391 - nouveau E[ PFIFO][0000:01:00.0] read fault at 0x000020f000 [PTE] from BAR1/HOST_CPU on channel 0x00ffbdf000 [unknown]
Summary: nouveau E[ PFIFO][0000:01:00.0] read fault at 0x000020f000 [PTE] from BAR1/...
Status: NEW
Alias: None
Product: Drivers
Classification: Unclassified
Component: Video(DRI - non Intel) (show other bugs)
Hardware: x86-64 Linux
: P1 normal
Assignee: drivers_video-dri
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2014-07-30 13:12 UTC by Srihari Vijayaraghavan
Modified: 2014-10-12 01:15 UTC (History)
0 users

See Also:
Kernel Version: 3.17.0
Subsystem:
Regression: No
Bisected commit-id:

Attachments
kernel boot up messages extracted from syslog (/var/log/messages) (49.28 KB, application/gzip)
2014-07-30 13:12 UTC, Srihari Vijayaraghavan 		Details
lspci & .config (342.14 KB, application/gzip)
2014-07-30 13:15 UTC, Srihari Vijayaraghavan 		Details
Add an attachment (proposed patch, testcase, etc.)

Description Srihari Vijayaraghavan 2014-07-30 13:12:17 UTC 
Created attachment 144731 [details]
kernel boot up messages extracted from syslog (/var/log/messages)

The error message displayed on the subject line floods the kernel log buffer:
nouveau E[   PFIFO][0000:01:00.0] read fault at 0x000020f000 [PTE] from BAR1/HOST_CPU on channel 0x00ffbdf000 [unknown]
...
[   33.807019] systemd-journald[550]: /dev/kmsg buffer overrun, some messages lost.

All of the useful messages I could extract out of syslog (/var/log/messages) based on the kernel boot up time stamp is attached to this report.

I've also provided lspci -vvv & my .config as well.

I was however pleasantly surprised that the X.org & KDE did come up & appear to be functioning fine, even including glxgears running smoothly as well.

Thank you for progressing Nouveau so far, so quickly & so nicely. And am happy to test any patch you may want me to.
Comment 1 Srihari Vijayaraghavan 2014-07-30 13:15:36 UTC 
Created attachment 144741 [details]
lspci & .config
Comment 2 Srihari Vijayaraghavan 2014-07-30 13:21:04 UTC 
Actually, seeing how the flooding hasn't stopped, I've rebooted it to Intel 4600 video chip, disabling GTX 860m in the BIOS/firmware. However, I'm happy to re-enable it and test any patch, if you want me to.

Thanks
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