[]Below is part of syslog for last startup. i have been getting freezes for no apparent reason during various operations, some programe others while in a shell. It happens in Windows XP as well as a couple of distros I am trying, ArkLinux and Knoppix.

Sep 15 08:32:04 localhost kernel: [fglrx] Maximum main memory to use for locked dma buffers: 431 MBytes.
Sep 15 08:32:04 localhost kernel: ACPI: PCI Interrupt 0000:01:00.0[A] -> GSI 16 (level, low) -> IRQ 201
Sep 15 08:32:04 localhost kernel: [fglrx] module loaded - fglrx 8.20.8 [Dec 6 2005] on minor 0
Sep 15 08:32:04 localhost kernel: [fglrx] ACPI power management is initialized.
Sep 15 08:32:04 localhost kernel: [fglrx] Kernel AGP support doesn't provide agplock functionality.
Sep 15 08:32:04 localhost kernel: [fglrx] AGP detected, AgpState = 0x1f000217 (hardware caps of chipset)
Sep 15 08:32:04 localhost kernel: agpgart: Found an AGP 2.0 compliant device at 0000:00:00.0.
Sep 15 08:32:04 localhost kernel: agpgart: Putting AGP V2 device at 0000:00:00.0 into 4x mode
Sep 15 08:32:04 localhost kernel: agpgart: Putting AGP V2 device at 0000:01:00.0 into 4x mode
Sep 15 08:32:04 localhost kernel: [fglrx] AGP enabled, AgpCommand = 0x1f000314 (selected caps)
Sep 15 08:32:04 localhost kernel: [fglrx] free AGP = 51113984
Sep 15 08:32:04 localhost kernel: [fglrx] max AGP = 51113984
Sep 15 08:32:04 localhost kernel: [fglrx] free LFB = 122679296
Sep 15 08:32:04 localhost kernel: [fglrx] max LFB = 122679296
Sep 15 08:32:04 localhost kernel: [fglrx] free Inv = 134217728
Sep 15 08:32:04 localhost kernel: [fglrx] max Inv = 134217728
Sep 15 08:32:04 localhost kernel: [fglrx] total Inv = 134217728
Sep 15 08:32:04 localhost kernel: [fglrx] total TIM = 0
Sep 15 08:32:04 localhost kernel: [fglrx] total FB = 0
Sep 15 08:32:04 localhost kernel: [fglrx] total AGP = 16384
Sep 15 08:32:32 localhost kernel: 13f758>] zap_pte_range+0x171/0x1fd
Sep 15 08:32:32 localhost kernel: [unmap_page_range+217/232] unmap_page_range+0xd9/0xe8
Sep 15 08:32:32 localhost kernel: [unmap_vmas+172/376] unmap_vmas+0xac/0x178
Sep 15 08:32:32 localhost kernel: [unmap_region+125/242] unmap_region+0x7d/0xf2
Sep 15 08:32:32 localhost kernel: [do_munmap+205/236] do_munmap+0xcd/0xec
Sep 15 08:32:32 localhost kernel: [sys_munmap+57/84] sys_munmap+0x39/0x54
Sep 15 08:32:32 localhost kernel: [syscall_call+7/11] syscall_call+0x7/0xb
Sep 15 08:32:32 localhost kernel: Trying to fix it up, but a reboot is needed
Sep 15 08:32:32 localhost kernel: Bad page state at free_hot_cold_page (in process 'artsd', page c13de040)
Sep 15 08:32:32 localhost kernel: flags:0x80000404 mapping:00000000 mapcount:0 count:0
Sep 15 08:32:33 localhost kernel: Backtrace:
Sep 15 08:32:33 localhost kernel: [bad_page+92/146] bad_page+0x5c/0x92
Sep 15 08:32:33 localhost kernel: [free_hot_cold_page+86/223] free_hot_cold_page+0x56/0xdf
Sep 15 08:32:33 localhost kernel: [zap_pte_range+369/509] zap_pte_range+0x171/0x1fd
Sep 15 08:32:33 localhost kernel: [unmap_page_range+217/232] unmap_page_range+0xd9/0xe8
Sep 15 08:32:33 localhost kernel: [unmap_vmas+172/376] unmap_vmas+0xac/0x178
Sep 15 08:32:33 localhost kernel: [unmap_region+125/242] unmap_region+0x7d/0xf2
Sep 15 08:32:33 localhost kernel: [do_munmap+205/236] do_munmap+0xcd/0xec
Sep 15 08:32:33 localhost kernel: [sys_munmap+57/84] sys_munmap+0x39/0x54
Sep 15 08:32:33 localhost kernel: [syscall_call+7/11] syscall_call+0x7/0xb
Sep 15 08:32:33 localhost kernel: Trying to fix it up, but a reboot is needed
Sep 15 08:32:33 localhost kernel: Bad page state at free_hot_cold_page (in process 'artsd', page c13de060)
Sep 15 08:32:33 localhost kernel: flags:0x80000404 mapping:00000000 mapcount:0 count:0
Sep 15 08:32:33 localhost kernel: Backtrace:
Sep 15 08:32:33 localhost kernel: [bad_page+92/146] bad_page+0x5c/0x92
Sep 15 08:32:33 localhost kernel: [free_hot_cold_page+86/223] free_hot_cold_page+0x56/0xdf
Sep 15 08:32:33 localhost kernel: [zap_pte_range+369/509] zap_pte_range+0x171/0x1fd
Sep 15 08:32:34 localhost kernel: [unmap_page_range+217/232] unmap_page_range+0xd9/0xe8
Sep 15 08:32:34 localhost kernel: [unmap_vmas+172/376] unmap_vmas+0xac/0x178
Sep 15 08:32:34 localhost kernel: [unmap_region+125/242] unmap_region+0x7d/0xf2
Sep 15 08:32:34 localhost kernel: [do_munmap+205/236] do_munmap+0xcd/0xec
Sep 15 08:32:34 localhost kernel: [sys_munmap+57/84] sys_munmap+0x39/0x54
Sep 15 08:32:34 localhost kernel: [syscall_call+7/11] syscall_call+0x7/0xb
Sep 15 08:32:34 localhost kernel: Trying to fix it up, but a reboot is needed
Sep 15 08:32:34 localhost kernel: Bad page state at free_hot_cold_page (in process 'artsd', page c13de080)
Sep 15 08:32:34 localhost kernel: flags:0x80000404 mapping:00000000 mapcount:0 count:0
Sep 15 08:32:34 localhost kernel: Backtrace:
Sep 15 08:32:34 localhost kernel: [bad_page+92/146] bad_page+0x5c/0x92
Sep 15 08:32:34 localhost kernel: [free_hot_cold_page+86/223] free_hot_cold_page+0x56/0xdf
Sep 15 08:32:34 localhost kernel: [zap_pte_range+369/509] zap_pte_range+0x171/0x1fd
Sep 15 08:32:35 localhost kernel: [unmap_page_range+217/232] unmap_page_range+0xd9/0xe8
Sep 15 08:32:35 localhost kernel: [unmap_vmas+172/376] unmap_vmas+0xac/0x178
Sep 15 08:32:35 localhost kernel: [unmap_region+125/242] unmap_region+0x7d/0xf2
Sep 15 08:32:35 localhost kernel: [do_munmap+205/236] do_munmap+0xcd/0xec
Sep 15 08:32:36 localhost kernel: [sys_munmap+57/84] sys_munmap+0x39/0x54
Sep 15 08:32:36 localhost kernel: [syscall_call+7/11] syscall_call+0x7/0xb
Sep 15 08:32:36 localhost kernel: Trying to fix it up, but a reboot is needed

could please advise what on earth this means and how to fix it.

1.8MHz Celeron
Gigabyte Titan P4 667 m/board.
512MB RAM
ATI Radeon 9550 video card

Help would be much appreciated
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