[Bug 22599] Re: enabling DMA on CD-ROMs causes hal failures

[Mark Manashirov]

With the latest stock Dapper kernel (2.6.15-20) I'm not seeing any "hdc: lost interrupt" messages nor does my shell become unresponsive after many (3+) suspend cycles.

I think I may have figured out what was causing my initial problem though.  By unloading ohci1394 I'm able to resume from the second cycle and beyond.

I noticed this when testing with the vanilla kernel.  I initially thought it was fixed, but I only configured a kernel with minimal support.  With full support I had the same problem.  After a lot of experimenting, I narrowed it down to ohci1394.

So, the DMA/CDROM seems to be working fine (I hope), and unloading/reloading ohci1394 doesn't seem to cause problems.  I don't use firewire though so I can't really test it.
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enabling DMA on CD-ROMs causes hal failures
https://launchpad.net/malone/bugs/22599