Отваливается дисковод

pix@localhost ~ $ ls /dev/sr*
/dev/sr0

udev

А где логи? ;)

Apr 15 16:55:54 localhost syslog-ng[11246]: syslog-ng starting up; version='3.1.4'
Apr 15 16:55:55 localhost /usr/sbin/gpm[11421]: *** info [daemon/startup.c(136)]:
Apr 15 16:55:55 localhost /usr/sbin/gpm[11421]: Started gpm successfully. Entered daemon mode.
Apr 15 16:56:02 localhost pppd[12347]: Plugin passwordfd.so loaded.
Apr 15 16:56:02 localhost pppd[12347]: Created /dev/ppp device node
Apr 15 16:56:02 localhost pppd[12352]: pppd 2.4.4 started by root, uid 0
Apr 15 16:56:02 localhost pptp[12356]: anon log[main:pptp.c:310]: The synchronous pptp option is NOT activated
Apr 15 16:56:02 localhost pppd[12352]: Using interface ppp0
Apr 15 16:56:02 localhost pppd[12352]: Connect: ppp0 <--> /dev/pts/0
Apr 15 16:56:02 localhost pptp[12372]: anon log[ctrlp_rep:pptp_ctrl.c:251]: Sent control packet type is 1 'Start-Control-Connection-Request'
Apr 15 16:56:02 localhost pptp[12372]: anon log[ctrlp_disp:pptp_ctrl.c:739]: Received Start Control Connection Reply
Apr 15 16:56:02 localhost pptp[12372]: anon log[ctrlp_disp:pptp_ctrl.c:773]: Client connection established.
Apr 15 16:56:03 localhost pptp[12372]: anon log[ctrlp_rep:pptp_ctrl.c:251]: Sent control packet type is 7 'Outgoing-Call-Request'
Apr 15 16:56:03 localhost pptp[12372]: anon log[ctrlp_disp:pptp_ctrl.c:858]: Received Outgoing Call Reply.
Apr 15 16:56:03 localhost pptp[12372]: anon log[ctrlp_disp:pptp_ctrl.c:897]: Outgoing call established (call ID 0, peer's call ID 15942).
Apr 15 16:56:03 localhost pppd[12352]: CHAP authentication succeeded: Welcome.
Apr 15 16:56:03 localhost pppd[12352]: CHAP authentication succeeded
Apr 15 16:56:03 localhost pppd[12352]: local IP address
Apr 15 16:56:03 localhost pppd[12352]: remote IP address
Apr 15 16:56:14 localhost polkitd[13213]: started daemon version 0.99 using authority implementation `local' version `0.99'
Apr 15 16:56:15 localhost gnome-session[13223]: WARNING: GSIdleMonitor: Unable to initialize Sync extension
Apr 15 16:57:03 localhost pptp[12372]: anon log[logecho:pptp_ctrl.c:677]: Echo Reply received.
Apr 15 16:58:03 localhost pptp[12372]: anon log[logecho:pptp_ctrl.c:677]: Echo Reply received.

вот все, что после включения и тырканья дисковода

лог ядра нужен?

EXT3-fs (hdb3): using internal journal
EXT3-fs: barriers not enabled
kjournald starting. Commit interval 5 seconds
EXT3-fs (hdb1): using internal journal
EXT3-fs (hdb1): mounted filesystem with ordered data mode
Adding 7084660k swap on /dev/hdb2. Priority:-1 extents:1 across:7084660k
r8169 0000:02:00.0: eth0: link up
r8169 0000:02:00.0: eth0: link up
PPP generic driver version 2.4.2
NET: Registered protocol family 10
lo: Disabled Privacy Extensions
pci 0000:01:00.0: PCI INT A -> GSI 16 (level, low) -> IRQ 16
[drm] Initialized drm 1.1.0 20060810
[drm] radeon defaulting to userspace modesetting.
pci 0000:01:00.0: setting latency timer to 64
[drm] Initialized radeon 1.33.0 20080528 for 0000:01:00.0 on minor 0
[drm] Setting GART location based on new memory map
[drm] Loading R500 Microcode
[drm] Num pipes: 1
[drm] writeback test succeeded in 1 usecs
eth0: no IPv6 routers present
UDP: bad checksum. From 46.233.2.201:7095 to 93.157.236.81:51000 ulen 70
CPU1: Core temperature above threshold, cpu clock throttled (total events = 1)
Disabling lock debugging due to kernel taint
CPU1: Core temperature/speed normal
[Hardware Error]: Machine check events logged
CPU1: Core temperature/speed normal
[Hardware Error]: Machine check events logged
CPU1: Core temperature/speed normal
CPU0: Core temperature above threshold, cpu clock throttled (total events = 74740)
CPU0: Core temperature/speed normal
[Hardware Error]: Machine check events logged
UDP: bad checksum. From 46.233.2.201:7095 to 93.157.236.81:51000 ulen 70
CPU1: Core temperature/speed normal
CPU0: Core temperature above threshold, cpu clock throttled (total events = 208693)
CPU0: Core temperature/speed normal
[Hardware Error]: Machine check events logged
CPU1: Core temperature/speed normal
operapluginwrap[23864]: segfault at 3f2d2104 ip b5ef62f7 sp bfe9bbc8 error 4 in libflashplayer.so[b5901000+b5f000]
[Hardware Error]: Machine check events logged
CPU1: Core temperature above threshold, cpu clock throttled (total events = 1849360)
[Hardware Error]: Machine check events logged
CPU1: Core temperature/speed normal
CPU0: Core temperature/speed normal
[Hardware Error]: Machine check events logged
UDP: bad checksum. From 46.233.2.201:7095 to 93.157.236.81:51000 ulen 70
CPU1: Core temperature above threshold, cpu clock throttled (total events = 2391976)
CPU1: Core temperature/speed normal
[Hardware Error]: Machine check events logged
CPU1: Core temperature above threshold, cpu clock throttled (total events = 2473595)
CPU1: Core temperature/speed normal
ata2.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x0
sr 1:0:0:0: CDB: Test Unit Ready: 00 00 00 00 00 00
ata2.00: cmd a0/00:00:00:00:00/00:00:00:00:00/a0 tag 0
res 51/04:03:00:00:00/00:00:00:00:00/a0 Emask 0x1 (device error)
ata2.00: status: { DRDY ERR }
[Hardware Error]: Machine check events logged
ata2.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6 frozen
sr 1:0:0:0: CDB: Test Unit Ready: 00 00 00 00 00 00
ata2.00: cmd a0/00:00:00:00:00/00:00:00:00:00/a0 tag 0
res 40/00:03:00:00:00/00:00:00:00:00/a0 Emask 0x4 (timeout)
ata2.00: status: { DRDY }
ata2: link is slow to respond, please be patient (ready=0)
ata2: device not ready (errno=-16), forcing hardreset
ata2: soft resetting link
ata2: link is slow to respond, please be patient (ready=0)
ata2: SRST failed (errno=-16)
ata2: soft resetting link
ata2: link is slow to respond, please be patient (ready=0)
ata2: SRST failed (errno=-16)
ata2: soft resetting link
ata2: link is slow to respond, please be patient (ready=0)
ata2: SRST failed (errno=-16)
ata2: soft resetting link
ata2: SRST failed (errno=-16)
ata2: reset failed, giving up
ata2.00: disabled
ata2: EH complete

самое прискорбное то, что на форточках дисковод заводится на ура.
P.S. как-нибудь запишу на диктофон и выложу сюда бредни нашего "умного" информатика в сторону linux в общем :)

Попробуйте закоментировать строку в fstab относительно cdrom и перезагрузитесь.