I've had the chance to further examine this bug on my box. I've found some things that could even make the bug report not applicable, but i'd like to ask for advice on further testing:
1.- the problem is not exclusive to the kernel versions mentioned above, it just hadn't appeared before on the ones marked ok. I have experienced the same problem with all tested kernels from 2.6.27-7 and above. 2.- i have experienced the same problem with kubuntu hardy, intrepid and jaunty beta install disks, as well as debian lenny. 3.- the problem is completely erratic. sometimes it appears at boot, sometimes it appears on x startup, sometimes only after a few minutes after the session login. It seems to be related to high disk IO, but i could not be certain of this, ie i don't know if the problem appears with the machine "idle". 4.- but most important of all, i have solved it, apparently: blacklisting ahci in /etc/modprobe.d/blacklist makes the problem go away, by forcing libata to use the ata_piix driver for all drives (im sure there must be a more elegant way of doing this, but after googling for days on "how to disable ahci" i gave up and just blacklisted the module to test it). Now, the strange part is that this configuration should be properly supported by ahci, as the ICH6M controller is thoroughly tested, and the Hitachi disk that was causing problems is not particularly esotheric... but i wouldn't know how to test this further, much less change ahci config params to see if i can get this drive on this controller to work (if theres any params that could make the disk behave). In any case, the bug (?) seems to be located in the AHCI module, and it seems to affect this HW configuration only, so i don't know if it makes any sense keepin it open. I'm willing to try anything suggested if it helps to isolate the issue. thanks for your time! On Mon, Apr 6, 2009 at 1:35 PM, Leann Ogasawara <[email protected]> wrote: > ** Tags added: intrepid regression-release > > -- > ata timeout exception with linux 2.6.28-11 > https://bugs.launchpad.net/bugs/352197 > You received this bug notification because you are a direct subscriber > of the bug. > -- entia non sunt multiplicanda praeter necessitatem -- ata timeout exception with linux 2.6.28-11 https://bugs.launchpad.net/bugs/352197 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
