Recently I have been having a lot of trouble with my RH8.0 installation. I've got a Latitude C600 Dell laptop with RH8.0 kernel version 2.4.18.

Only in the last day and today I have had RH blocked out 3 times due to a kernel oops, which leaves me without the ability to do anything to unfreeze my PC (keyboard, mouse, screen frozen).

I have had a couple of messages at computer bootup saying that the physical memory size had been decreased due to some kind of issue found in RAM. Maybe this has somethign to do with this (although mind you my PC is dual boot and with WXP I've had no issue)

/var/log/messages :

First PC lockout:

Feb 6 21:35:01 edusilva-1 kernel: Unable to handle kernel paging request at virtual address 4f83db4c
Feb 6 21:35:01 edusilva-1 kernel: printing eip:
Feb 6 21:35:01 edusilva-1 kernel: c0136b47
Feb 6 21:35:01 edusilva-1 kernel: *pde = 00000000
Feb 6 21:35:01 edusilva-1 kernel: Oops: 0000
Feb 6 21:35:01 edusilva-1 kernel: ide-cd cdrom maestro3 ac97_codec soundcore binfmt_misc autofs xircom_cb ds yenta_socket pcmcia_core iptable_filter ip_tables microcode nls_iso8859-1 nls_cp437
Feb 6 21:35:01 edusilva-1 kernel: CPU: 0
Feb 6 21:35:01 edusilva-1 kernel: EIP: 0010:[<c0136b47>] Not tainted
Feb 6 21:35:01 edusilva-1 kernel: EFLAGS: 00010206
Feb 6 21:35:01 edusilva-1 kernel:
Feb 6 21:35:01 edusilva-1 kernel: EIP is at refill_inactive_zone [kernel] 0xe7 (2.4.18-24.8.0)
Feb 6 21:35:01 edusilva-1 kernel: eax: 4f83db28 ebx: c1062f2c ecx: 00000000 edx: 00000000
Feb 6 21:35:01 edusilva-1 kernel: esi: c1062f10 edi: 000001df ebp: c0300e80 esp: c1923fac
Feb 6 21:35:02 edusilva-1 kernel: ds: 0018 es: 0018 ss: 0018
Feb 6 21:35:02 edusilva-1 kernel: Process kswapd (pid: 5, stackpage=c1923000)
Feb 6 21:35:02 edusilva-1 kernel: Stack: c0300e80 00000002 c0300f24 c1922000 00000000 000004de c1922000 c0300e80
Feb 6 21:35:02 edusilva-1 kernel: c1922245 0008e000 c0137014 c0300e80 00000006 cffd0018 00010f00 cffd9fb8
Feb 6 21:35:02 edusilva-1 kernel: c0105000 c010747e 00000000 c0136ee0 00000000
Feb 6 21:35:02 edusilva-1 kernel: Call Trace: [<c0137014>] kswapd [kernel] 0x134 (0xc1923fd4))
Feb 6 21:35:02 edusilva-1 kernel: [<c0105000>] stext [kernel] 0x0 (0xc1923fec))
Feb 6 21:35:02 edusilva-1 kernel: [<c010747e>] kernel_thread [kernel] 0x2e (0xc1923ff0))
Feb 6 21:35:02 edusilva-1 kernel: [<c0136ee0>] kswapd [kernel] 0x0 (0xc1923ff8))
Feb 6 21:35:02 edusilva-1 kernel:
Feb 6 21:35:02 edusilva-1 kernel:
Feb 6 21:35:02 edusilva-1 kernel: Code: 8b 50 24 85 d2 75 12 8b 40 28 85 c0 0f 84 d8 00 00 00 8d b4
Feb 6 22:10:00 edusilva-1 syslogd 1.4.1: restart.
Feb 6 22:10:00 edusilva-1 syslog: syslogd startup succeeded
Feb 6 22:10:00 edusilva-1 syslog: klogd startup succeeded
Feb 6 22:10:00 edusilva-1 kernel: klogd 1.4.1, log source = /proc/kmsg started.


Second PC blocking:

Feb 6 23:08:38 edusilva-1 kernel: Trying to vfree() nonexistent vm area (d0a48000)
Feb 6 23:08:38 edusilva-1 kernel: ce447f68 00000286 00000600 c011eb7e ce4460dc cd960e00 0000000a ce446000
Feb 6 23:08:38 edusilva-1 kernel: 0000ff00 c0119439 cd960e00 00000206 cd960e00 c011e046 cd960e00 00000000
Feb 6 23:08:38 edusilva-1 kernel: ce446000 0000000a 406a62c1 bfffb05c c011e223 0000ff00 c0109147 000000ff
Feb 6 23:08:38 edusilva-1 kernel: Call Trace: [<c011eb7e>] do_setitimer [kernel] 0xde (0xce447f74))
Feb 6 23:08:38 edusilva-1 kernel: [<c0119439>] mmput [kernel] 0x39 (0xce447f8c))
Feb 6 23:08:38 edusilva-1 kernel: [<c011e046>] do_exit [kernel] 0xa6 (0xce447f9c))
Feb 6 23:08:38 edusilva-1 kernel: [<c011e223>] sys_exit [kernel] 0x13 (0xce447fb8))
Feb 6 23:08:38 edusilva-1 kernel: [<c0109147>] system_call [kernel] 0x33 (0xce447fc0))
Feb 6 23:08:38 edusilva-1 kernel:
Feb 6 23:19:52 edusilva-1 gconfd (edusilva-1693): starting (version 1.2.1), pid 1693 user 'edusilva'
Feb 6 23:19:52 edusilva-1 gconfd (edusilva-1693): Resolved address "xml:readonly:/etc/gconf/gconf.xml.mandatory" to a read-only config source at position 0
Feb 6 23:19:52 edusilva-1 gconfd (edusilva-1693): Resolved address "xml:readwrite:/home/edusilva/.gconf" to a writable config source at position 1
Feb 6 23:19:52 edusilva-1 gconfd (edusilva-1693): Resolved address "xml:readonly:/etc/gconf/gconf.xml.defaults" to a read-only config source at position 2
Feb 6 23:21:52 edusilva-1 gconfd (edusilva-1693): GConf server is not in use, shutting down.
Feb 6 23:21:52 edusilva-1 gconfd (edusilva-1693): Exiting

Third PC Blocking:

Feb 7 12:41:32 edusilva-1 kernel: Unable to handle kernel paging request at virtual address 10000000
Feb 7 12:41:32 edusilva-1 kernel: printing eip:
Feb 7 12:41:32 edusilva-1 kernel: c0141bc4
Feb 7 12:41:32 edusilva-1 kernel: *pde = 00000000
Feb 7 12:41:32 edusilva-1 kernel: Oops: 0002
Feb 7 12:41:32 edusilva-1 kernel: ide-cd cdrom maestro3 ac97_codec soundcore binfmt_misc autofs xircom_cb ds yenta_socket pcmcia_core 3c59x iptable_filter ip_tables microcode nls_iso8859-1 nls
Feb 7 12:41:32 edusilva-1 kernel: CPU: 0
Feb 7 12:41:32 edusilva-1 kernel: EIP: 0010:[<c0141bc4>] Not tainted
Feb 7 12:41:32 edusilva-1 kernel: EFLAGS: 00010246
Feb 7 12:41:32 edusilva-1 kernel:
Feb 7 12:41:32 edusilva-1 kernel: EIP is at __remove_from_queues [kernel] 0x14 (2.4.18-24.8.0)
Feb 7 12:41:32 edusilva-1 kernel: eax: 00000000 ebx: c4fa9880 ecx: c4fa9500 edx: 10000000
Feb 7 12:41:32 edusilva-1 kernel: esi: c4fa9500 edi: c4fa9880 ebp: c1116cf0 esp: c1923f60
Feb 7 12:41:32 edusilva-1 kernel: ds: 0018 es: 0018 ss: 0018
Feb 7 12:41:32 edusilva-1 kernel: Process kswapd (pid: 5, stackpage=c1923000)
Feb 7 12:41:32 edusilva-1 kernel: Stack: c014497b c4fa9500 c1116d0c c1112894 00003897 c1116cf0 c01366f0 c1116cf0
Feb 7 12:41:32 edusilva-1 kernel: 000001d0 c0300f2c 000008d6 0000090b 00000575 c0300e80 0000002e 000001d0
Feb 7 12:41:32 edusilva-1 kernel: 0008e000 c0136998 c0300e80 000001d0 00000000 000001d0 00000000 c1922245
Feb 7 12:41:32 edusilva-1 kernel: Call Trace: [<c014497b>] try_to_free_buffers [kernel] 0x5b (0xc1923f60))
Feb 7 12:41:32 edusilva-1 kernel: [<c01366f0>] page_launder_zone [kernel] 0x3e0 (0xc1923f78))
Feb 7 12:41:32 edusilva-1 kernel: [<c0136998>] page_launder [kernel] 0x68 (0xc1923fa4))
Feb 7 12:41:32 edusilva-1 kernel: [<c0136d81>] do_try_to_free_pages [kernel] 0x11 (0xc1923fc0))
Feb 7 12:41:32 edusilva-1 kernel: [<c0136f56>] kswapd [kernel] 0x76 (0xc1923fd4))
Feb 7 12:41:32 edusilva-1 kernel: [<c0105000>] stext [kernel] 0x0 (0xc1923fec))
Feb 7 12:41:32 edusilva-1 kernel: [<c010747e>] kernel_thread [kernel] 0x2e (0xc1923ff0))
Feb 7 12:41:32 edusilva-1 kernel: [<c0136ee0>] kswapd [kernel] 0x0 (0xc1923ff8))
Feb 7 12:41:32 edusilva-1 kernel:
Feb 7 12:41:32 edusilva-1 kernel:
Feb 7 12:41:32 edusilva-1 kernel: Code: 89 02 c7 41 30 00 00 00 00 89 4c 24 04 e9 7a ff ff ff 8d 76


I don't know where I should start to try to fix this. Can somebody help me out and tell me what I can do to correct this?

Thanks for your help.