Bug 21966

Summary:

[G45 KMS DVI] display goes black intermittently

Product:

xorg

Reporter:

matej.tyc

Component:

Driver/intel

Assignee:

Jesse Barnes <jbarnes>

Status:

RESOLVED FIXED

QA Contact:

Xorg Project Team <xorg-team>

Severity:

normal

Priority:

medium

Keywords:

NEEDINFO

Version:

unspecified

Hardware:

x86-64 (AMD64)

OS:

Linux (All)

Whiteboard:

i915 platform:

i915 features:

Bug Depends on:

20644

Bug Blocks:

Attachments:

Description	Flags
output of dmesg	none
Xorg.0.log	none
set FIFO watermarks at DPMS & mode set time	none

Description matej.tyc 2009-05-27 07:16:31 UTC

Hello, I have a similar problem that is described here: http://bugs.freedesktop.org/show_bug.cgi?id=17805
From time to time, the display goes black for a short while. It is not predictable and occurs roughly once per 5 minutes.
I have Asus p5q-vm with G45 chipset with a monitor connected via DVI.
KMS not OK with the 2.6.29.4 kernel and xf86-video-intel 2.7.1
It was quite OK regarding this issue with the 2.6.29.3 kernel though.
Disabling KMS makes things working again.
How can I help to solve this problem?
Regards,
Matej

Comment 1 Gordon Jin 2009-05-29 05:28:14 UTC

http://intellinuxgraphics.org/how_to_report_bug.html asks you to provide Xorg.0.log and dmesg output.

Comment 2 matej.tyc 2009-06-01 02:10:00 UTC

Sorry for the incomplete bugreport. Here are the required specs:
Software versions:
libdrm 2.4.11, xorg-server 1.6.1.901, xf86-video-intel 2.7.1, kernel 2.6.29.4. Distribution: Up-to-date Archlinux
The rest is in the first post.
Regards,
Matej

Comment 3 matej.tyc 2009-06-01 02:10:29 UTC

Created attachment 26333 [details]
output of dmesg

Comment 4 matej.tyc 2009-06-01 02:11:02 UTC

Created attachment 26334 [details]
Xorg.0.log

Comment 5 matej.tyc 2009-06-14 05:54:25 UTC

I think that the bug 20644 is absolutelly unrelated to this issue. Might it be some sort of a typo?

Comment 6 Jesse Barnes 2009-06-23 18:27:21 UTC

Created attachment 27067 [details] [review]
set FIFO watermarks at DPMS & mode set time

Here's a KMS patch to set the FIFO regs.  Might help with screen blanking, please give it a try.

Comment 7 matej.tyc 2009-06-24 05:25:50 UTC

I have updated to the 2.6.30 kernel that made it into my distro today nad this issue seems to be resolved since the upgrade. 
So I even haven't tried your patch...
Regards,
Matej

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