CPU0 is about 50% (up to 100%) interrupt in top when urtwn is plugged in. I think this is a driver bug by itself. This explains heating.
09.11.2013, 01:20, "Alexander Pakhomov" <ker0...@yandex.ru>: > 09.11.2013, 00:48, "Alexander Pakhomov" <ker0...@yandex.ru>: > >> 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. > > Found in man; > >> 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?
