Instant reboot with New Xorg

[Konstantin Belousov]

On Sat, Aug 02, 2014 at 07:41:28PM -0700, Steve Kargl wrote:
> There is no panic nor core if X11 is started with startx.
> There is an instant reboot.  However, doing
> 
> % Xorg -configure
> 
> yields a panic that can be dumped.
> 
> Hardware: Dell Latitude D530 laptop
> 
> Showing only the video related dmesg output, I have
> 
> FreeBSD 11.0-CURRENT #0 r269385: Fri Aug  1 10:39:21 PDT 2014
>     root at laptop-kargl.apl.washington.edu:/usr/obj/usr/src/sys/MOBILE i386
> FreeBSD clang version 3.4.1 (tags/RELEASE_34/dot1-final 208032) 20140512
> CPU: Intel(R) Core(TM)2 Duo CPU     T7250  @ 2.00GHz (1995.05-MHz 686-class CPU)
>   Origin="GenuineIntel"  Id=0x6fd  Family=0x6  Model=0xf  Stepping=13
>   Features=0xbfebfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CLFLUSH,DTS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE>
>   Features2=0xe3bd<SSE3,DTES64,MON,DS_CPL,VMX,EST,TM2,SSSE3,CX16,xTPR,PDCM>
>   AMD Features=0x20000000<LM>
>   AMD Features2=0x1<LAHF>
>   TSC: P-state invariant, performance statistics
> real memory  = 3221225472 (3072 MB)
> avail memory = 3135918080 (2990 MB)
> 
> vgapci0: <VGA-compatible display> port 0xeff8-0xefff mem 0xfea00000-0xfeafffff,0xe0000000-0xefffffff irq 16 at device 2.0 on pci0
> agp0: <Intel GM965 SVGA controller> on vgapci0
> agp0: aperture size is 256M, detected 7676k stolen memory
> drm0: <Intel i965GM> on vgapci0
> info: [drm] MSI enabled 1 message(s)
> info: [drm] AGP at 0xe0000000 256MB
> info: [drm] Initialized i915 1.6.0 20080730
> vgapci0: Boot video device
> vgapci1: <VGA-compatible display> mem 0xfeb00000-0xfebfffff at device 2.1 on pci0
> sc0: <System console> at flags 0x100 on isa0
> sc0: VGA <8 virtual consoles, flags=0x300>
> vga0: <Generic ISA VGA> at port 0x3c0-0x3df iomem 0xa0000-0xbffff on isa0
> 
> -- 
> Steve
> 
> laptop-kargl.apl.washington.edu dumped core - see /var/crash/vmcore.1
> 
> Sat Aug  2 19:22:11 PDT 2014
> 
> FreeBSD laptop-kargl.apl.washington.edu 11.0-CURRENT FreeBSD 11.0-CURRENT #0 r269385: Fri Aug  1 10:39:21 PDT 2014     root at laptop-kargl.apl.washington.edu:/usr/obj/usr/src/sys/MOBILE  i386
> 
> panic: make_dev_credv: bad si_name (error=17, si_name=dri/card0)

Errno 17 is EEXISTS, since it comes from the devfs node instantiation,
I am almost sure that you have both drm and drm2 in your kernel. Most
likely, drm is compiled in or loaded as module at boot time, while drm2
is loaded by X server on initialization.
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