Bug 20866

Summary:

[drm:gm45_get_vblank_counter] *ERROR* trying to get vblank count for disabled pipe 0

Product:

xorg

Reporter:

Arkadiusz Miskiewicz <arekm>

Component:

Driver/intel

Assignee:

Jesse Barnes <jbarnes>

Status:

RESOLVED FIXED

QA Contact:

Xorg Project Team <xorg-team>

Severity:

normal

Priority:

medium

Keywords:

NEEDINFO

Version:

7.4 (2008.09)

Hardware:

x86-64 (AMD64)

OS:

Linux (All)

Whiteboard:

i915 platform:

i915 features:

Attachments:

Description	Flags
xorg log	none
dmesg	none
new xorg log	none
new dmesg	none

Description Arkadiusz Miskiewicz 2009-03-25 16:05:13 UTC

I'm using:
- xserver 1.6
- kernel 2.6.29
- drm from airlied drm-next branch
- intel driver from git master (from 20 minutes ago)
- UXA enabled, DRI also enabled

When logging out from kde4 kdm X segfaults, unfortunately backtrace is not logged, log just ends with:

(**) Option "xkb_options" "altwin:left_meta_win,lv3:menu_switch"

Backtrace:

and X is restarted.

Few logins/logouts and dmesg contains:
[ 2447.649952] [drm:gm45_get_vblank_counter] *ERROR* trying to get vblank count for disabled pipe 0
[ 2636.120552] [drm:gm45_get_vblank_counter] *ERROR* trying to get vblank count for disabled pipe 0
[ 2637.532974] X[12404]: segfault at 2 ip 00007f65a14dd0bf sp 00007fffbeb769b0 error 4 in libgcc_s.so.1[7f65a14cd000+16000]
[ 2637.581244] [drm:gm45_get_vblank_counter] *ERROR* trying to get vblank count for disabled pipe 0
[ 2708.597008] [drm:gm45_get_vblank_counter] *ERROR* trying to get vblank count for disabled pipe 0
[ 2708.618726] mtrr: no MTRR for d0000000,10000000 found
[ 2710.001075] X[12753]: segfault at 2 ip 00007fc5f2c880bf sp 00007fff103c6230 error 4 in libgcc_s.so.1[7fc5f2c78000+16000]
[ 2710.053275] [drm:gm45_get_vblank_counter] *ERROR* trying to get vblank count for disabled pipe 0
[ 2761.432990] [drm:gm45_get_vblank_counter] *ERROR* trying to get vblank count for disabled pipe 0
[ 2761.454403] mtrr: no MTRR for d0000000,10000000 found
[ 2771.693794] X[13069]: segfault at 2 ip 00007fe8673580bf sp 00007fff847e3630 error 4 in libgcc_s.so.1[7fe867348000+16000]
[ 2771.742306] [drm:gm45_get_vblank_counter] *ERROR* trying to get vblank count for disabled pipe 0

Comment 1 Gordon Jin 2009-03-25 19:07:02 UTC

Please attach the full Xorg.0.log and dmesg.

Comment 2 Arkadiusz Miskiewicz 2009-03-26 00:39:47 UTC

Created attachment 24252 [details]
xorg log

Comment 3 Arkadiusz Miskiewicz 2009-03-26 00:42:21 UTC

Created attachment 24253 [details]
dmesg

Xorg and dmesg logs attached.

Note that this time I used drm from final 2.6.29 (previously drm-next) and intel driver from git from 2.7 branch.

Now doing the same test again but with drm from drm-next and intel from git from master branch.

Comment 4 Arkadiusz Miskiewicz 2009-03-26 01:05:04 UTC

Unfortunately seems that I cannot reproduce the "trying to get vblank count for disabled pipe 0" easily.

I always get with #20867 triggered even back on intel master and drm from drm-next when trying to trigger "disabled pipe" thing.

Comment 5 Arkadiusz Miskiewicz 2009-03-26 12:30:03 UTC

Created attachment 24284 [details]
new xorg log

Comment 6 Arkadiusz Miskiewicz 2009-03-26 12:31:15 UTC

Created attachment 24286 [details]
new dmesg

Figured out how to reproduce. This vblank thing happens if KMS/modeset is disabled.

Comment 7 Jesse Barnes 2009-03-30 17:54:49 UTC

Can you try updating your Mesa to 7.4ish?  This bug should be fixed there I think.

Comment 8 Arkadiusz Miskiewicz 2009-04-06 06:04:39 UTC

Updated to 7.4, so far unable to reproduce (unforunteatly I never know how to reliably trigger it).

Comment 9 Jesse Barnes 2009-04-07 16:55:20 UTC

Prior to Mesa 7.4 it should have happened everytime a DRI app started...  Anyway thanks for confirming.

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