The last couple of weeks I've experienced an increasing frequency of kernel panics. It all started the 25. October (yes, the day before Leopard release) - when I without any warning got a kernel panic. I don't exactly remember what I did before the incident, but the following weekend it happened about 5-10 times. Before this weekend I've only seen it maybe 5 og 6 times (in two and a half years!). The next week my computer also refused to boot properly, and I was forced to install Ubuntu (I was luckily able to do some backup before I formatted). I ran Ubuntu a couple of days without any several problems (of course the PPC-processor is a **** in Linux), so I decided to install Tiger again. The installation worked out nicely, and I thought the problem were solved.

But no. Today I'm in an entirely clean system (I did of course do a clean install), but with the same problems. The system is very unstable and is halting when I try to launch applications needing any graphic resources (this could be a wmv-/avi-movie, Grapher or some Java applets). Some times the computer won't even boot, it just shows me a kernel panic before the login windows appears.

So, I've managed to localize the problem as the graphic card. The output I get after boot when a kernel panic has occured confirms this, the whole error is to be found below.

I appreciate any kind of help, and if I've missed something on Google I'm sorry.

panic(cpu 0 caller 0x00099CB8): mapping_remove: hw_rem_map failed - pmap = 00367000, va = 0000000000002000, code = 010DC082

Latest stack backtrace for cpu 0:
         0x000952D8 0x000957F0 0x00026898 0x00099CB8 0x00098D70 0x00062930 0x000A7E78 0x000AB980 
Proceeding back via exception chain:
   Exception state (sv=0x2796B280)
      PC=0x0092BBD0; MSR=0x00009030; DAR=0x000020F4; DSISR=0x0A000000; LR=0x0092B82C; R1=0x0D1CBBA0; XCP=0x0000000C (0x300 - Data access)
0x0092B82C 0x00928DC0 0x00917660 0x002E9200 0x002EB0CC 0x0008C06C 
         0x0002921C 0x000233F8 0x000ABCAC 0x00000000 
      Kernel loadable modules in backtrace (with dependencies):
            dependency: com.apple.iokit.IOPCIFamily(1.7)@0x469000
            dependency: com.apple.iokit.IOGraphicsFamily(1.4.1)@0x5b4000
            dependency: com.apple.iokit.IONDRVSupport(1.4.1)@0x5d8000
            dependency: com.apple.NVDAResman(4.1.8)@0x5ee000
   Exception state (sv=0x38CA4280)
      PC=0x9000B348; MSR=0x0200F030; DAR=0x00307074; DSISR=0x42000000; LR=0x9000B29C; R1=0xBFFFB850; XCP=0x00000030 (0xC00 - System call)

Kernel version:
Darwin Kernel Version 8.10.0: Wed May 23 16:50:59 PDT 2007; root:xnu-792.21.3~1/RELEASE_PPC
Model: PowerBook6,8, BootROM 4.9.0f0, 1 processors, PowerPC G4  (1.2), 1.5 GHz, 512 MB
Graphics: GeForce FX Go5200, GeForce FX Go5200, AGP, 64 MB
Memory Module: DIMM0/BUILT-IN, 256 MB, built-in, built-in
Memory Module: DIMM1/J31, 256 MB, DDR SDRAM, PC2700U-25330
AirPort: AirPort Extreme, 405.1 (
Modem: Jump, V.92, Version 1.0
Bluetooth: Version 1.7.14f14, 2 service, 0 devices, 1 incoming serial ports
Network Service: AirPort, AirPort, en1
Parallel ATA Device: MAT****ACD-RW  CW-8123
Parallel ATA Device: FUJITSU MHT2060AH, 55.89 GB
USB Device: Bluetooth HCI, Up to 12 Mb/sec, 500 mA
USB Device: Apple Internal Trackpad, Apple Computer, Up to 12 Mb/sec, 500 mA
USB Device: USB Receiver, Logitech, Up to 1.5 Mb/sec, 500 mA