Description of the problem:
- AMD-64 based system, ASUS A8V Deluxe mother board, NVIDIA GE-Force 5200 128Mb
- Occurs randomly during periods when system is unloaded, i.e. nobody logged. So
usually at night.
- System booted in init mode 3 (text mode login screen).
- All X-window related stuff not running (see prv. point).
- Kernel crash, console found filled with kernel stack dump trace. Machine at
RIP state.
- Updated to last FC4 official kernel, no difference with initial kernel of DVD
FC4 distribution: 
[delmott@PCLinux2 ~]$ rpm -q kernel
kernel-2.6.14-1.1644_FC4

- Found in /var/log/messages:
Dec  8 21:06:07 PCLinux2 kernel: Unable to handle kernel paging request at
ffff80003ffa1108 RIP:
Dec  8 21:06:07 PCLinux2 kernel: <ffffffff80197754>{writeback_inodes+68}
Dec  8 21:06:07 PCLinux2 kernel: PGD 0
Dec  8 21:06:07 PCLinux2 kernel: Oops: 0000 [1]
Dec  8 21:06:07 PCLinux2 kernel: CPU 0
Dec  8 21:06:07 PCLinux2 kernel: Modules linked in: ipv6 parport_pc lp parport
autofs4 rfcomm l2cap bluetooth sunrpc pcmcia yenta_socket rsrc_nonstatic
pcmcia_core video button battery ac ohci1394 ieee1394 uhci_hcd ehci_hcd shpchp
i2c_viapro i2c_core snd_via82xx gameport snd_ac97_codec snd_ac97_bus
snd_seq_dummy snd_seq_oss snd_seq_midi_event snd_seq snd_pcm_oss snd_mixer_oss
snd_pcm snd_timer snd_page_alloc snd_mpu401_uart snd_rawmidi snd_seq_device snd
soundcore skge sk98lin floppy ext3 jbd dm_mod sata_promise sata_via libata
sd_mod scsi_mod
Dec  8 21:06:07 PCLinux2 kernel: Pid: 148, comm: pdflush Not tainted
2.6.14-1.1644_FC4 #1
Dec  8 21:06:07 PCLinux2 kernel: RIP: 0010:[<ffffffff80197754>]
<ffffffff80197754>{writeback_inodes+68}
Dec  8 21:06:07 PCLinux2 kernel: RSP: 0018:ffff81003fa15e28  EFLAGS: 00010287
Dec  8 21:06:07 PCLinux2 kernel: RAX: ffff80003ffa1108 RBX: ffff80003ffa1000
RCX: 00000000ffffffff
Dec  8 21:06:07 PCLinux2 kernel: RDX: ffffffffffffffff RSI: 0000000000000246
RDI: ffff81003ed69000
Dec  8 21:06:07 PCLinux2 kernel: RBP: ffff81003ed69078 R08: 00000000000001f4
R09: 0000000000000003
Dec  8 21:06:07 PCLinux2 kernel: R10: 00000000000009f8 R11: 0000000000000000
R12: ffff81003fa15e48
Dec  8 21:06:07 PCLinux2 kernel: R13: ffffffff8015bcdd R14: 0000000000000206
R15: ffffffff80145ee0
Dec  8 21:06:07 PCLinux2 kernel: FS:  00002aaaaaac8900(0000)
GS:ffffffff804f8000(0000) knlGS:0000000000000000
Dec  8 21:06:07 PCLinux2 kernel: CS:  0010 DS: 0018 ES: 0018 CR0: 000000008005003b
Dec  8 21:06:07 PCLinux2 kernel: CR2: ffff80003ffa1108 CR3: 0000000039f51000
CR4: 00000000000006e0
Dec  8 21:06:07 PCLinux2 kernel: Process pdflush (pid: 148, threadinfo
ffff81003fa14000, task ffff81003f9c3800)
Dec  8 21:06:07 PCLinux2 kernel: Stack: 0000000000001065 0000000100426049
ffff810002141d38 ffffffff8015b4e5
Dec  8 21:06:07 PCLinux2 kernel:        0000000000000000 0000000000000000
ffff81003fa15eb0 0000000000000400
Dec  8 21:06:07 PCLinux2 kernel:        0000000000000000 0000000000000000
Dec  8 21:06:07 PCLinux2 kernel: Call Trace:<ffffffff8015b4e5>{wb_kupdate+283}
<ffffffff8015be0f>{pdflush+306}
Dec  8 21:06:07 PCLinux2 kernel:        <ffffffff8015b3ca>{wb_kupdate+0}
<ffffffff8014610c>{kthread+191}
Dec  8 21:06:07 PCLinux2 kernel:        <ffffffff8012e66b>{schedule_tail+66}
<ffffffff8010f20e>{child_rip+8}
Dec  8 21:06:07 PCLinux2 kernel:       
<ffffffff80145ee0>{keventd_create_kthread+0} <ffffffff8014604d>{kthread+0}
Dec  8 21:06:07 PCLinux2 kernel:        <ffffffff8010f206>{child_rip+0}
Dec  8 21:06:07 PCLinux2 kernel:
Dec  8 21:06:07 PCLinux2 kernel: Code: 48 3b 83 08 01 00 00 75 10 48 8d 83 18 01
00 00 48 3b 83 18
Dec  8 21:06:07 PCLinux2 kernel: RIP <ffffffff80197754>{writeback_inodes+68} RSP
<ffff81003fa15e28>
Dec  8 21:06:07 PCLinux2 kernel: CR2: ffff80003ffa1108

- See complete log of different system parameters in attachment


Version-Release number of selected component (if applicable):

Fedora Core 4 x86_64 with updated kernel: kernel-2.6.14-1.1644_FC4


How reproducible:
- Every day: leave the system powered up at night. It will reproduce before you
get back the day after.


Steps to Reproduce:
1. Leave the system alone, unlog all users.
2. 
3.
  
Actual results:
- Kernel stack trace


Expected results:
- System keeps alive for years !

Additional info:
- I will check if I cannot update the bios of MB.
- I am suspicous about ACPId. If problem persist, I will recompile my own kernel
while debarquing a maximum of unnecessary options. But I do not like to have to
customize the kernel for each hardware flavor.