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Bug#420402: Getting a better backtrace.



On Wed, May  2, 2007 at 19:34:04 +0200, Brice Goglin wrote:

> Joey Hess wrote:
> > I do have a useful bit of info though. The crash only happens with my
> > old xorg.conf. I let a new one be generated, and blobwars runs ok.
> >
> > The relevant change seems to be running at 24 bpp. If I switch it back
> > to 16 I can reproduce the crash again.
> >   
> 
> Ok, I can reproduce now, 16bits made the trick.
> But I don't get any interesting backtrace either, even with the server
> and driver built with nostrip and noopt.
> 
It crashes here too.
I restarted X with DefaultDepth 16, logged in, started blobwars -> crash
(with useless backtrace, obviously).
Then I let xdm restart X, logged in again (still 16 bit depth), started
blobwars, and it runs fine...
Diff between the two logs attached, didn't see anything obvious in it...

Cheers,
Julien
--- /var/log/Xorg.0.log.old	2007-05-15 03:07:40.000000000 +0200
+++ /var/log/Xorg.0.log	2007-05-15 03:13:36.000000000 +0200
@@ -11,7 +11,7 @@
 Markers: (--) probed, (**) from config file, (==) default setting,
 	(++) from command line, (!!) notice, (II) informational,
 	(WW) warning, (EE) error, (NI) not implemented, (??) unknown.
-(==) Log file: "/var/log/Xorg.0.log", Time: Tue May 15 03:06:25 2007
+(==) Log file: "/var/log/Xorg.0.log", Time: Tue May 15 03:07:42 2007
 (==) Using config file: "/etc/X11/xorg.conf"
 (==) ServerLayout "Default Layout"
 (**) |-->Screen "Default Screen" (0)
@@ -615,11 +615,11 @@
 (II) intel(0): 0x00200000-0x003fffff: back buffer (2048 kB)
 (II) intel(0): 0x00400000-0x005fffff: depth buffer (2048 kB)
 (II) intel(0): 0x007bf000:            end of stolen memory
-(II) intel(0): 0x007bf000-0x007bffff: Core cursor (4 kB, 0x2b8d3000 physical)
-(II) intel(0): 0x007c0000-0x007c3fff: ARGB cursor (16 kB, 0x131a4000 physical)
-(II) intel(0): 0x007c4000-0x007c4fff: Core cursor (4 kB, 0x2bea2000 physical)
-(II) intel(0): 0x007c5000-0x007c8fff: ARGB cursor (16 kB, 0x20edc000 physical)
-(II) intel(0): 0x007c9000-0x007c9fff: overlay registers (4 kB, 0x2be9f000 physical)
+(II) intel(0): 0x007bf000-0x007bffff: Core cursor (4 kB, 0x0505f000 physical)
+(II) intel(0): 0x007c0000-0x007c3fff: ARGB cursor (16 kB, 0x145ec000 physical)
+(II) intel(0): 0x007c4000-0x007c4fff: Core cursor (4 kB, 0x037e3000 physical)
+(II) intel(0): 0x007c5000-0x007c8fff: ARGB cursor (16 kB, 0x020e8000 physical)
+(II) intel(0): 0x007c9000-0x007c9fff: overlay registers (4 kB, 0x280ab000 physical)
 (II) intel(0): 0x007d0000-0x017c7fff: front buffer (16352 kB)
 (II) intel(0): 0x017c8000-0x037c7fff: DRI memory manager (32768 kB)
 (II) intel(0): 0x037c8000-0x057c7fff: textures (32768 kB)
@@ -639,7 +639,7 @@
 (II) intel(0): [drm] DRM interface version 1.2
 (II) intel(0): [drm] created "i915" driver at busid "pci:0000:00:02.0"
 (II) intel(0): [drm] added 8192 byte SAREA at 0xf8bc5000
-(II) intel(0): [drm] mapped SAREA 0xf8bc5000 to 0xb7c6e000
+(II) intel(0): [drm] mapped SAREA 0xf8bc5000 to 0xb7c3c000
 (II) intel(0): [drm] framebuffer handle = 0xc07d0000
 (II) intel(0): [drm] added 1 reserved context for kernel
 (II) intel(0): Unable to use TTM-based memory manager with DRM version 1.5
@@ -783,20 +783,4 @@
 (--) Synaptics Touchpad auto-dev sets device to /dev/input/event3
 (**) Option "Device" "/dev/input/event3"
 (--) Synaptics Touchpad touchpad found
-
-Backtrace:
-0: /usr/bin/X(xf86SigHandler+0x81) [0x80c2511]
-1: [0xb7fd6420]
-2: [0xe700e700]
-
-Fatal server error:
-Caught signal 11.  Server aborting
-
-(II) AIGLX: Suspending AIGLX clients for VT switch
-(II) intel(0): xf86UnbindGARTMemory: unbind key 0
-(II) intel(0): xf86UnbindGARTMemory: unbind key 1
-(II) intel(0): xf86UnbindGARTMemory: unbind key 2
-(II) intel(0): xf86UnbindGARTMemory: unbind key 3
-(II) intel(0): xf86UnbindGARTMemory: unbind key 4
-(II) intel(0): xf86UnbindGARTMemory: unbind key 5
-(II) intel(0): xf86UnbindGARTMemory: unbind key 6
+AUDIT: Tue May 15 03:13:36 2007: 31887 X: client 13 rejected from local host (uid 0)

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