misc/140809: Xorg 7.4 radeon drm crashes 8.0

Roberto de Iriarte rdeiriar at spock.cl
Mon Nov 23 13:30:08 UTC 2009

>Number:         140809
>Category:       misc
>Synopsis:       Xorg 7.4 radeon drm crashes 8.0
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    freebsd-bugs
>State:          open
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Mon Nov 23 13:30:07 UTC 2009
>Originator:     Roberto de Iriarte
>Release:        8.0-RC3 + see below
FreeBSD t42 8.0-PRERELEASE FreeBSD 8.0-PRERELEASE #0: Mon Nov 23 08:42:00 CLST 2009     root at t42:/usr/obj/usr/src/sys/GENERIC  i386
I have just installed 8.0 RC3 (i386) on my old IBM T42, which has an Ati Radeon 7500 graphics device. 

Unfortunately, Xorg 7.4 crashes the whole system upon exit. My first reaction was to upgrade the kernel to RELENG_8 as of yesterday, but the bug is still there.

Disabling DRI On xorg.conf solved it.

Some additional investigations led me to some Linux users that experienced the same problem on this hardware, as reported here (i disagree on it being solved however, i'm also filling this bug report with the freedesktop people):


In my case, putting

Option "AGPMode" "4" 

on the Device section of xorg.conf solved it.

Start Xorg 7.4 with DRI enabled.

Put Option "AGPMode" "4" 

on the Device section of xorg.conf


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