DVD playback jerky due to ata_generic module disabling DMA
Bug #175022 reported by
Tzadik Vanderhoof
This bug report is a duplicate of:
Bug #228302: [HARDY-LUCID] No DMA nor 32bits IO support.
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This bug affects 2 people
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
linux (Ubuntu) |
Incomplete
|
Undecided
|
Unassigned | ||
linux-source-2.6.22 (Ubuntu) |
Won't Fix
|
Undecided
|
Unassigned |
Bug Description
I have Ubuntu Dapper and Gutsy on my machine. It has a Sony DVD drive that works great under Dapper, but under every Ubuntu version after Dapper it has problems. I could not get it to work at all under Feisty, and under Gutsy, I can only get it to work by adding the "all-generic-ide" boot parameter. However, DVD movies play choppy under Gutsy (again, fine on Dapper).
I noticed that the DVD mounts as /dev/hdd under Dapper but /dev/scd1 under Feisty. I tried using hdparm to turn on DMA but it came back with an error.
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