09.11.2013, 00:37, "Stefan Sperling" <s...@openbsd.org>: > On Sat, Nov 09, 2013 at 12:17:35AM +0400, Alexander Pakhomov wrote: > >> Hi! >> ?) my usb wifi adapter probably overheated near cpu fan out > > I have a similar issue with urtwn. Working wifi is hit and miss, > and when it doesn't work the USB wifi dongle is usually very hot. > No idea why it's happening. > >> 1) I've got the same symptoms as with Atheros: net hangs, dhclient fails >> with No buffer space available > > That probably means the card isn't transmitting packets to the > access point. Are you sure you're within range of the AP? > Does this happen close to the AP? > It is really close. Seems to be a driver bug >> 2) I pull usb off and got kernel panic with ddb prompt (page fault). I >> forget to remember execution address. I know, I am an idiot. >> >> Is it OK to get kernel panic due to USB device bug? > > No it isn't and such bugs are not unheard of (here's an old example > of such a bug: http://marc.info/?l=openbsd-cvs&m=134210904504514&w=2) > > If you can still reproduce this issue in -current a dmesg and ddb > trace and ps output as per the bug report instructions would be great. How can I get trace in ddb? I've got no "bt" and I didn't see how to do it in "help". Verbouse answer would be great. Don't see "trace" in man ddb too. I don't want to miss a chance if it happens again this way.
How can I attach separate disk slice (reserved for Linux) for kernel dump? I have 16 Gb RAM so I don't need swap. Is kernel damping every panic?
