Bug 59854

Summary: [agp] [panic] System panics when AMD 762 AGP is loaded
Product: Base System Reporter: Elliot Dierksen <elliot>
Component: i386Assignee: Eric Anholt <anholt>
Status: Closed FIXED    
Severity: Affects Only Me    
Priority: Normal    
Version: 4.9-RELEASE   
Hardware: Any   
OS: Any   
Attachments:
Description Flags
agp-amd.diff none

Description Elliot Dierksen 2003-11-30 18:30:18 UTC 
	System panics and reboots in X when agp device loaded.

Fix: 

Not sure. This may be a problem with the BIOS in my Tyan 2466, or a
	problem with the way the driver gets information regarding the AMD 762
	AGP bridge.
How-To-Repeat: 	It appears that the amd_agp.c file is not reading the BIOS setting for
	AGP graphics apperture. No matter how I have the BIOS set (it will go
	from 32MB to 512MB), agp0 sets it for 32MB. If the settings don't match,
	loading mozilla then running "dmesg | more" in an xterm window will
	cause the panic.
Comment 1 Eric Anholt 2004-08-21 09:02:02 UTC 
Attached is a patch that may help with AMD AGP issues.  It was
improperly handling aperture sizes of 512M or higher, and the shutdown
function (called as part of rebooting) may have been broken enough to
confuse the hardware.  If people could give it a try and tell me if it
improves the situation at all, that would be great.  I'm still doubtful
it'll fix this PR, but it's a step.

-- 
Eric Anholt                                eta@lclark.edu          
http://people.freebsd.org/~anholt/         anholt@FreeBSD.org
Comment 2 Eric Anholt freebsd_committer freebsd_triage 2004-08-22 04:58:33 UTC 
State Changed
From-To: open->feedback

Waiting for feedback from either of two reporters of AMD 762 issues.
Comment 3 Eric Anholt freebsd_committer freebsd_triage 2005-05-07 02:01:45 UTC 
Responsible Changed
From-To: freebsd-i386->anholt

Hang on to this one in my list of AGP PRs.  How does it still exist?
Comment 4 Remko Lodder freebsd_committer freebsd_triage 2007-03-26 21:30:52 UTC 
State Changed
From-To: feedback->closed

Eric requested feedback almost a year ago, nothing happened, closing the 
ticket.