kern/155319: Immediate kernel crash when starting X on 9.0-CURRENT with r400/r500 GPU

[Adam Kirchhoff]

>Number:         155319
>Category:       kern
>Synopsis:       Immediate kernel crash when starting X on 9.0-CURRENT with r400/r500 GPU
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Sun Mar 06 19:20:09 UTC 2011
>Closed-Date:
>Last-Modified:
>Originator:     Adam Kirchhoff
>Release:        9.0-CURRENT
>Organization:
None
>Environment:
FreeBSD sorrow.ashke.com 9.0-CURRENT FreeBSD 9.0-CURRENT #3: Tue Feb 22 04:53:58 EST 2011     root@:/usr/obj/usr/src/sys/SORROW  amd64

>Description:

As soon as I start X with either an X850 or X1900 in this particular machine running 9.0-CURRENT, I get a kernel crash.  There is no kernel debug prompt, and no dump created.  The only output on the serial port is below.  A radeon HD4850 works fine, leading me to believe that this is specific to the r300-r500 DRM code.  If I configure Xorg to disable glx and dri, X starts up.




Fatal trap 28: machine check trap while in kernel mode
Fatal trap 28: machine check trap while in kernel mode
cpuid = 3; cpuid = 2; apic id = 03
apic id = 02
instruction pointer     = 0x20:0xffffffff809e6346
instruction pointer     = 0x20:0xffffffff809e6346
stack pointer           = 0x28:0xffffff8000033ad0
stack pointer           = 0x28:0xffffff8000038ad0
frame pointer           = 0x28:0xffffff8000033ae0
frame pointer           = 0x28:0xffffff8000038ae0
code segment            = base 0x0, limit 0xfffff, type 0x1b
code segment            = base 0x0, limit 0xfffff, type 0x1b
                        = DPL 0, pres 1, long 1, def32 0, gran 1
                        = DPL 0, pres 1, long 1, def32 0, gran 1
processor eflags        = processor eflags      = interrupt enabled, interrupt enabled, IOPL = 0
IOPL = 0
current process         = current process               = 11 (idle: cpu3)
1

Fatal trap 28: machine check trap while in kernel mode
cpuid = 2; apic id = 02
instruction pointer     = 0x20:0xffffffff809f5aa2
stack pointer           = 0x28:0xffffff800001bdf0
frame pointer           = 0x28:0xffffff800001be20
code segment            = base 0x0, limit 0xfffff, type 0x1b
                        = DPL 0, pres 1, long 1, def32 0, gran 1
processor eflags        = IOPL = 0
current process         = 11 (idle: cpu2)

>How-To-Repeat:

Install 9.0-CURRENT on a machine with a radeon r4xx/r5xx GPU.  Start X.
>Fix:


>Release-Note:
>Audit-Trail:
>Unformatted: