I have the very same issue with Ubuntu Gutsy Gibbon.
My computer has the following hardware
AMD Opteron 146 64 bits Microprocessor
ASUS A8N-E SLI Motherboard
SATA II Western Digital Caviar 250 GB Hard Disk
ASUS DVDRW-1608P2S DVD Rewriter / Reader Dual Layer With Firmware version 1.06
ASUS DVD-E616A2 DVD Reader Dual Layer with Firmare version 1.03
Kernell 2.6.22-14-generic
I got the following error on bootup:
"hdd: drive not ready for command" (hdd is the DVD Reader)
Sometimes the machine freezes for minutes and mnutes trying to read the
DVD I insert.
A few minutes ago it freezed up and here is what appears on /var/log/messages:
Dec 27 22:46:44 vivasoft kernel: [ 219.400838] hdd: irq timeout: status=0xd0 {
Busy }
Dec 27 22:46:44 vivasoft kernel: [ 219.400842] ide: failed opcode was: unknown
Dec 27 22:46:50 vivasoft kernel: [ 224.618806] hdd: status timeout:
status=0xd0 { Busy }
Dec 27 22:46:50 vivasoft kernel: [ 224.618810] ide: failed opcode was: unknown
Dec 27 22:46:50 vivasoft kernel: [ 224.618844] Clocksource tsc unstable (delta
= 4684610135 ns)
Dec 27 22:46:50 vivasoft kernel: [ 224.621314] Time: acpi_pm clocksource has
been installed.
Dec 27 22:46:55 vivasoft kernel: [ 229.825466] hdd: status timeout:
status=0xd0 { Busy }
Dec 27 22:46:55 vivasoft kernel: [ 229.825470] ide: failed opcode was: unknown
Dec 27 22:47:00 vivasoft kernel: [ 235.075005] hdd: status timeout:
status=0xd0 { Busy }
Dec 27 22:47:00 vivasoft kernel: [ 235.075010] ide: failed opcode was: unknown
Dec 27 22:47:05 vivasoft kernel: [ 240.283225] hdd: status timeout:
status=0xd0 { Busy }
Dec 27 22:47:05 vivasoft kernel: [ 240.283229] ide: failed opcode was: unknown
Dec 27 22:47:10 vivasoft kernel: [ 245.491444] hdd: status timeout:
status=0xd0 { Busy }
Dec 27 22:47:10 vivasoft kernel: [ 245.491448] ide: failed opcode was: unknown
Dec 27 22:47:16 vivasoft kernel: [ 250.699662] hdd: status timeout:
status=0xd0 { Busy }
Dec 27 22:47:16 vivasoft kernel: [ 250.699667] ide: failed opcode was: unknown
Dec 27 22:47:21 vivasoft kernel: [ 255.907882] hdd: status timeout:
status=0xd0 { Busy }
Dec 27 22:47:21 vivasoft kernel: [ 255.907887] ide: failed opcode was: unknown
Dec 27 22:47:26 vivasoft kernel: [ 261.116101] hdd: status timeout:
status=0xd0 { Busy }
Dec 27 22:47:26 vivasoft kernel: [ 261.116105] ide: failed opcode was: unknown
Dec 27 22:47:26 vivasoft kernel: [ 261.116109] hdd: DMA disabled
Dec 27 22:47:26 vivasoft kernel: [ 261.163718] hdd: ATAPI reset complete
Dec 27 22:47:26 vivasoft kernel: [ 261.455101] VFS: busy inodes on changed
media.
and eventually recognized the DVD but sometimes even ubuntu did not
recognize my DVD drive at all.
--
Feisty freeze, kernel (?) tries to access DVD drive
https://bugs.launchpad.net/bugs/75295
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