Public bug reported:
Binary package hint: linux-image-2.6.17-10-generic
Reading from the dvd drive in edgy is painfully slow. dd (invoked as: dd
if=/dev/scd0 of=/dev/null bs=100M count=1) reports a read-speed of
~1.8MB/s. The same problem existed in dapper, and i think it's related
to bug #42083.
I've tried booting with combined_mode=ide, combined_mode=libata, neither
made any difference, nor did passing the atapi_enabled=1 parameter to
libata. Most of the instructions i've found on the net talk about
getting libata/ata_piix to handle the sata controller instead of ide-
generic, but in my case that's already the case, and DMA still doesn't
work, despite dmesg claiming the drive is set up for UDMA/33. DMA works
fine for the hard drive though.
Software:
Edgy release
linux-image-2.6.17-10-generic
Hardware:
Ibm t43p laptop
Intel 82801FBM (ICH6M) SATA Controller. Pciid 8086:2653
** Affects: linux-source-2.6.17 (Ubuntu)
Importance: Undecided
Status: Unconfirmed
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DMA doesn't work in edgy on t43p dvd drive
https://launchpad.net/bugs/70685
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