Comment 129 for bug 75295

> Problem solved for Asus A6Rp laptop --FIRMWARE UPGRADE REQUIRED --

Asus A6 with warranty replaced DVD drive to 'CD/DVDW TS-L632D' with AS05 firmware.
Ubuntu 7.10, randomly freezed for a few seconds with no DVD activity, kern.log snippet follow.

--8<--
Apr 13 13:59:26 flame kernel: [ 1832.172000] ata1.01: qc timeout (cmd 0xa0)
Apr 13 13:59:26 flame kernel: [ 1832.172000] ata1.01: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x2 frozen
Apr 13 13:59:26 flame kernel: [ 1832.172000] ata1.01: cmd a0/00:00:00:00:20/00:00:00:00:00/b0 tag 0 cdb 0x0 data 0
Apr 13 13:59:26 flame kernel: [ 1832.172000] res 51/20:03:00:00:00/00:00:00:00:00/b0 Emask 0x5 (timeout)
Apr 13 13:59:31 flame kernel: [ 1837.212000] ata1: port is slow to respond, please be patient (Status 0xd1)
Apr 13 13:59:36 flame kernel: [ 1842.196000] ata1: device not ready (errno=-16), forcing hardreset
Apr 13 13:59:36 flame kernel: [ 1842.196000] ata1: soft resetting port
Apr 13 13:59:36 flame kernel: [ 1842.556000] ata1.00: configured for UDMA/100
Apr 13 13:59:36 flame kernel: [ 1842.744000] ata1.01: configured for UDMA/33
Apr 13 13:59:36 flame kernel: [ 1842.744000] ata1: EH complete
--8<--

After cross flashing to SC03 the problem disappeared.

BIG thanks Gareth!