problem with radeon X1400 under freebsd 8-current

[jackal]

Hello,

I have a problem with Radeon X1400 (dell 6400) under freebsd 8-current:

startx results in a garbled screen when using the 'radeon' driver.
So I had to disable acceleration. About an hour later, when I turning on 
acceleration - it works perfect. Then I can restart X many times - it works. 
But after rebooting the problem repeats.

I compared some 'good' and 'bad' logs, the difference follows.
I can see, that everything works when these variables are zero:
Ring contents 0x00000000
Ring read ptr contents 0x00000000
Vertex/indirect buffers contents 0x00000000

But I have no idea, how to reset these manually, and why it resets itself in a 
hour.


$ diff -u bad2.log good2.log
--- bad2.log    2008-12-05 15:51:05.000000000 +0300
+++ good2.log   2008-12-05 16:00:39.000000000 +0300
@@ -12,7 +12,7 @@
 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: Fri Dec  5 15:49:12 2008
+(==) Log file: "/var/log/Xorg.0.log", Time: Fri Dec  5 16:00:11 2008
 (==) Using config file: "/etc/X11/xorg.conf"
 (==) ServerLayout "DELL"
 (**) |-->Screen "Screen0" (0)
@@ -783,17 +783,17 @@
 (II) RADEON(0): [drm] added 1 reserved context for kernel
 (II) RADEON(0): X context handle = 0x1
 (II) RADEON(0): [drm] installed DRM signal handler
-(II) RADEON(0): [pci] 8192 kB allocated with handle 0xc6689000
-(II) RADEON(0): [pci] ring handle = 0xc6689000
+(II) RADEON(0): [pci] 8192 kB allocated with handle 0xc8257000
+(II) RADEON(0): [pci] ring handle = 0xc8257000
 (II) RADEON(0): [pci] Ring mapped at 0x28924000
-(II) RADEON(0): [pci] Ring contents 0xbdf57fbf
-(II) RADEON(0): [pci] ring read ptr handle = 0xc678a000
+(II) RADEON(0): [pci] Ring contents 0x00000000
+(II) RADEON(0): [pci] ring read ptr handle = 0xc8358000
 (II) RADEON(0): [pci] Ring read ptr mapped at 0x28781000
-(II) RADEON(0): [pci] Ring read ptr contents 0xfe3fdbff
-(II) RADEON(0): [pci] vertex/indirect buffers handle = 0xc678b000
+(II) RADEON(0): [pci] Ring read ptr contents 0x00000000
+(II) RADEON(0): [pci] vertex/indirect buffers handle = 0xc8359000
 (II) RADEON(0): [pci] Vertex/indirect buffers mapped at 0x30c00000
-(II) RADEON(0): [pci] Vertex/indirect buffers contents 0x9afcffdf
-(II) RADEON(0): [pci] GART texture map handle = 0xc698b000
+(II) RADEON(0): [pci] Vertex/indirect buffers contents 0x00000000
+(II) RADEON(0): [pci] GART texture map handle = 0xc8559000
 (II) RADEON(0): [pci] GART Texture map mapped at 0x30e00000
 (II) RADEON(0): [drm] register handle = 0xdfdf0000
 (II) RADEON(0): [dri] Visual configs initialized
@@ -978,6 +978,6 @@
 Unblank CRTC 0 success
 (==) RADEON(0): Write-combining range (0xa0000,0x10000) was already clear
 (II) RADEON(0): [drm] removed 1 reserved context for kernel
-(II) RADEON(0): [drm] unmapping 8192 bytes of SAREA 0xc61c1000 at 0x2877f000
+(II) RADEON(0): [drm] unmapping 8192 bytes of SAREA 0xc7a84000 at 0x2877f000
 (II) RADEON(0): [drm] Closed DRM master.
 FreeFontPath: FPE "/usr/local/lib/X11/fonts/misc" refcount is 2, should be 1; 
fixing.


-- 
Kind regards, Eugeny.