Hello, I wrote to this list a few days ago asking if anyone else is seeing USB printing causing lockups. I heard back from one person, but I'll bet there are other out there. I didn't have time at the time to track this down further, but I have looked into this a bit more now. First, the problem. Whenever I would print anything to a USB device (/dev/usb/lp0, in my case), the machine would seem to lock up. Up until yesterday, I'd just be saying that it locks up, but yesterday, after it "hung", I let it sit for a few hours while I went on with my life. When I got back, it looks like it did print stuff, but mostly junk. Some of this junk was recognizable as various files (completely unrelated) from my filesystem. The machine was still unresponsive to anything, but my guess now is that it was doing something, but just stuck in a very busy loop. Anyway, I traced this problem back to the transition between 2.4.3 and 2.4.4. 2.4.5 and 2.4.6 are both affected by this problem. I also discovered that this problem went away if I used uhci.o instead of usb-uhci.o. Finally, the other guy I heard from, with similar printing problems, also found that it went away when using uhci.o. In addition, we're both using VIA chipsets. My system is a daul P3-600 system on a Tyan Tiger 133 (Apollo Pro 133a chipset). I'm using an SMP-enabled kernel, but I'm disabling APIC so that I can actually use USB. The other USB devices (mouse, SanDisk SDDR-31, and Rio 500) all seem to work fine with the usb-uhci.o module. I took a look at the patch to usb-uhci.c for 2.4.4, but the details of the changes were just way beyond my comprehension. I'm more than happy to try experimental patches, give extra system information, and just basically work with anyone who has the skills to fix this (Johannes? Greg?). (BTW, besides the wonderful debugging possibilities of having two UHCI modules in the kernel tree, what is the purpose of having both UHCI and UHCI_ALT?) Thanks, pete _______________________________________________ [EMAIL PROTECTED] To unsubscribe, use the last form field at: http://lists.sourceforge.net/lists/listinfo/linux-usb-users
