On Saturday, April 28, 2012 05:49:05, Camaleón wrote: > El 2012-04-27 a las 21:53 -0700, cletusjenkins escribió: ... > > I did find a problem where PCI slot 3 shares a DMA > > with the IDE controller, the NIC was in that slot. It is a 3com 3905B > > which is supposed to be able to share DMAs (and so does the > > controller), but after taking the card out the number of lockups went > > down, but still occur. Occasionally when it locks up I can still move > > the mouse and even type commands into an xterm, but if you do anything > > that hits the harddrive it locks up totally. At least once I was able > > to enter a shutdown command that worked, but usually it locks up before > > that happens.
That sounds like an I/O deadlock. > > I replaced the disks and cables, same problem. I moved the OS disk to > > another controller and it still locks up (eventually). I can do a > > fresh installl of debian without any lockups. I even took all the > > drives off the motherboards controllers, disabled the controller in > > the bios and used a disk/cable along with a PCI IDE card that worked > > in a spare machine. Still it eventually locked up. That is interesting. I'm assuming that the PCI IDE card used a different kernel module to support it, which suggest this is likely not an issue related to a particular driver. I have a couple of other suggestions you might consider trying. - Have the RAM that's in the machine tested using a hardware memory tester. [You can try using Memtest+ if you want, but there are certain resevered sections of the RAM that Memtest+ cannot test, which is why I'm suggesting this.] - Try a different kernel version if you can find one, because there's a chance that this is a deadlock issue that's fixed in a new kernel version. The easy way to do this is to find someone that has built a newer generic kernel, the more complicated way is to learn how to do custom kernel compilation directly to a Debian pacakge. - It's possible that this is hardware related in a way that's difficult to test. For instance I've recently learned that electrolytic capacitors slowly loose both capacity and voltage rating over time. -- Chris -- Chris Knadle chris.kna...@coredump.us -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/201204281149.41793.chris.kna...@coredump.us