Bug 52407 - [GLAMOR][Zaphod] xserver segfaults on startup (with backtrace).
Summary: [GLAMOR][Zaphod] xserver segfaults on startup (with backtrace).
Status: RESOLVED MOVED
Alias: None
Product: xorg
Classification: Unclassified
Component: Driver/Radeon (show other bugs)
Version: unspecified
Hardware: x86-64 (AMD64) Linux (All)
: medium normal
Assignee: xf86-video-ati maintainers
QA Contact: Xorg Project Team
URL:
Whiteboard:
Keywords:
Depends on:
Blocks:
 
Reported: 2012-07-23 18:05 UTC by Till Matthiesen
Modified: 2019-11-19 07:34 UTC (History)
0 users

See Also:
i915 platform:
i915 features:

Attachments
backtrace (7.26 KB, text/plain)
2012-07-23 18:05 UTC, Till Matthiesen 		no flags Details
xorg.conf (1.38 KB, text/plain)
2012-07-23 18:35 UTC, Till Matthiesen 		no flags Details
View All

Description Till Matthiesen 2012-07-23 18:05:55 UTC 
Created attachment 64559 [details]
backtrace

Hi,

I wanted to give the newly added GLAMOR acceleration a try.
Unfortunately it segfaults immediately. 
Find a backtrace attached.

X.Org Server 1.12.3
libdrm, mesa, glamor and DDX from master (today).
(glamor 0.4.1 segfaults also)
GPU Radeon HD 4850 (running in 2 screen Zaphod mode)
Comment 1 Felix Miata 2012-07-23 18:24:48 UTC 
Mime type is set wrong on attachment. Gecko won't open it.

Are you using 100% automagic, or are you using any config file in /etc/X11/? cf. bug 51640
Comment 2 Till Matthiesen 2012-07-23 18:35:39 UTC 
Created attachment 64560 [details]
xorg.conf

Hi Felix,

find the xorg.conf attached (hope the mime type is fine this time).

How can I use "automagic" when targeting Zaphod mode?
AFAIK I _have_ to specify separate screens in xorg.conf.
Otherwise I always ended up with a single big framebuffer 
using xrandr. I don't want that.
Comment 3 Alex Deucher 2012-07-23 18:56:25 UTC 
I don't think glamor will work with zaphod mode at the moment.  Does it work ok if you use non-zaphod mode?
Comment 4 Till Matthiesen 2012-07-23 19:35:48 UTC 
Indeed, Alex is right. 
It works for the single screen configuration.

So I have to revert to EXA, obviously not missing much yet:
A quick test with the scrolling performance of a
long Facebook page in Google Chrome 21.x has been more
than disappointing. It's awfully slow.

Are there any technical restrictions concerning 
Glamor+Zaphod mode? I plan to get new card in the next
months. AFAIK buying >= HD 7000 series card means
2D acceleration is _only_ provided through Glamor.
Without Zaphod mode and decent 2D performance this does
not sound like a good deal to me. :/
Comment 5 Michel Dänzer 2014-08-04 10:01:13 UTC 
Is this still an issue with xf86-video-ati 7.4.0 or later and glamor from xserver 1.16.0 or later?
Comment 6 Martin Peres 2019-11-19 07:34:45 UTC 
-- GitLab Migration Automatic Message --

This bug has been migrated to freedesktop.org's GitLab instance and has been closed from further activity.

You can subscribe and participate further through the new bug through this link to our GitLab instance: https://gitlab.freedesktop.org/xorg/driver/xf86-video-ati/issues/35.

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