On Thu, 9 Sep 2004, Daniel Miller (IMI) wrote: > It took me awhile to get back to this, but I finally tried your suggestions > below... and what an adventure that lead to!! Here's what happened: > > 1. I tried adding "pci=noacpi acpi=noirq" at the end of the 'kernel' line in > grub.conf, and when I rebooted the system panic-ed at that line, saying > > VFS: Cannot open root device "LABEL=/" > > though it handled the line just fine when the extra elements were not > specified.
In principle this should be solvable, but it's probably not worth pursuing... > 2. Then I tried just disabling all ACPI and APM functions in the BIOS; as > expected, the powersaved daemon didn't load, which should have accomplished > our objectives. However, 'cat /proc/bus/usb/devices' still hangs. > > Note, as I commented in previous messages, this hang only occurs if my > primary application has already called claim_interface on one or more USB > devices, but that is just the situation where I need to read that file!! Let's explore this approach more fully. Try doing this again, and when the 'cat' hangs get a stack dump using Alt-SysRq-T. If you can, make sure that your program doesn't have any URBs submitted while you do this. Finally, try stopping your program and see if that frees up 'cat'. > 3. I then tried entering the grub editor at boot time and typing these > parameters, but it still crashes. > > However, since I've disabled ACPI/APM in the BIOS, that shouldn't be what's > causing the 'cat' hangs, true?? So something else must be going wrong, I > think. Yes. With a little bit of luck, we ought to be able to find it. Alan Stern ------------------------------------------------------- This SF.Net email is sponsored by: YOU BE THE JUDGE. Be one of 170 Project Admins to receive an Apple iPod Mini FREE for your judgement on who ports your project to Linux PPC the best. Sponsored by IBM. Deadline: Sept. 13. Go here: http://sf.net/ppc_contest.php _______________________________________________ [EMAIL PROTECTED] To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-users
