Comment 9 for bug 112410

Correct, kaffiene isn't having any issues and opens normally with no error messages. Opening a dvd with k3b however demonstrates the same slow down and error messages:

dmesg output during k3b startup:
84577.188805] ata2.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x2 frozen
[84577.188817] ata2.00: cmd a0/01:00:00:00:00/00:00:00:00:00/a0 tag 0 cdb 0xac d
ata 8 in
[84577.188821] res 40/00:03:00:00:00/00:00:00:00:00/b0 Emask 0x4 (timeo
ut)
[84584.172327] ata2: port is slow to respond, please be patient (Status 0xd0)
[84607.120958] ata2: port failed to respond (30 secs, Status 0xd0)
[84607.120967] ata2: soft resetting port
[84608.864037] ata2.00: configured for UDMA/66
[84638.776098] ata2.01: qc timeout (cmd 0xef)
[84638.776108] ata2.01: failed to set xfermode (err_mask=0x4)
[84638.776114] ata2: failed to recover some devices, retrying in 5 secs
[84643.765450] ata2: soft resetting port
[84644.579236] ata2.00: configured for UDMA/66
[84674.495277] ata2.01: qc timeout (cmd 0xef)
[84674.495287] ata2.01: failed to set xfermode (err_mask=0x4)
[84674.495296] ata2.01: limiting speed to UDMA/33:PIO3
[84674.495299] ata2: failed to recover some devices, retrying in 5 secs
[84679.484643] ata2: soft resetting port
[84680.306429] ata2.00: configured for UDMA/66
[84710.218458] ata2.01: qc timeout (cmd 0xef)
[84710.218468] ata2.01: failed to set xfermode (err_mask=0x4)
[84710.218474] ata2.01: disabled
[84710.218478] ata2: failed to recover some devices, retrying in 5 secs
[84715.207824] ata2.00: failed to set xfermode (err_mask=0x40)
[84715.207832] ata2: failed to recover some devices, retrying in 5 secs
[84720.197186] ata2: soft resetting port
[84720.851438] ata2.00: configured for UDMA/66
[84720.851468] ata2: EH complete
[84725.974511] UDF-fs: Partition marked readonly; forcing readonly mount