[Dri-patches] [Bug #126600] G400 hangs XFree86 4.0.2 when running OpenGL

[<no...@so...>]

Bug #126600, was updated on 2000-Dec-21 07:34
Here is a current snapshot of the bug.

Project: Direct Rendering Infrastructure
Category: MGA X Server
Status: Open
Resolution: None
Bug Group: X Server Hang/Core Dump
Priority: 5
Submitted by: vortechs
Assigned to : nobody
Summary: G400 hangs XFree86 4.0.2 when running OpenGL

Details: X will hang if I run an OpenGL application (windowed or non-windowed) and I hit peak CPU load.  It doesn't do this if the CPU stays low enough.  The reason I noticed this is that I have a cpu monitor up and running, and when I run my windowed OpenGL app and X freezes, the CPU is consistantly at peak.

I get no feedback about what caused X to lock.  The screen freezes and I can't change VTs.  I *can* ssh in to the box and do things and reboot the system.  The Magic Sysrequest keys work as well.  Is there any way to turn some debugging on?  I would like to see what is going on with this, but can't figure out how to do so.  Hooking a serial cable up and piping the console to a different computer doesn't show anything either.
 
I have had this problem with the agpgart/mga modules from linux-2.4.0-test10 - test12.  It is extremely reproducable.  If I do not load these modules and the apps run in software mode, everything is fine.

My current setup is as follows (Let me know if more information is needed):
~> lspci
00:00.0 Host bridge: VIA Technologies, Inc. VT8363/8365 [KT133/KM133] (rev 02)
00:01.0 PCI bridge: VIA Technologies, Inc. VT8363/8365 [KT133/KM133 AGP]
00:04.0 ISA bridge: VIA Technologies, Inc. VT82C686 [Apollo Super South] (rev 22)
00:04.1 IDE interface: VIA Technologies, Inc. Bus Master IDE (rev 10)
00:04.2 USB Controller: VIA Technologies, Inc. UHCI USB (rev 10)
00:04.3 USB Controller: VIA Technologies, Inc. UHCI USB (rev 10)
00:04.4 Host bridge: VIA Technologies, Inc. VT82C686 [Apollo Super ACPI] (rev 30)
00:09.0 Multimedia audio controller: Ensoniq ES1371 [AudioPCI-97] (rev 07)
00:0a.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL-8139 (rev 10)
00:11.0 Unknown mass storage controller: Promise Technology, Inc. 20265 (rev 02)
01:00.0 VGA compatible controller: Matrox Graphics, Inc. MGA G400 AGP (rev 04)
~>  cat /proc/cpuinfo
processor       : 0
vendor_id       : AuthenticAMD
cpu family      : 6
model           : 4
model name      : AMD Athlon(tm) Processor
stepping        : 2
cpu MHz         : 1009.006
cache size      : 256 KB
fdiv_bug        : no
hlt_bug         : no
f00f_bug        : no
coma_bug        : no
fpu             : yes
fpu_exception   : yes
cpuid level     : 1
wp              : yes
flags           : fpu vme de pse tsc msr pae mce cx8 sep mtrr pge mca cmov pat pse36 mmx fxsr syscall mmxext 3dnowext 3dnow
bogomips        : 2011.96
~> uname -a
Linux antimony 2.4.0-test12 #5 Wed Dec 20 10:36:16 CST 2000 i686 unknown



For detailed info, follow this link:
http://sourceforge.net/bugs/?func=detailbug&bug_id=126600&group_id=387