Actually my old comment is wrong, this only happens when I unplug my phone. I emailed my dmesg to a Redhat kernel dev I know, and this is what he said:
> Here is a copy of what is in /var/log/syslog when I unplug my phone from > my laptop w/ the latest ubuntu kernel. > Jun 26 01:55:04 localhost kernel: [17180317.156000] kernel BUG at > kernel/workqueue.c:109! > Jun 26 01:55:04 localhost kernel: [17180317.156000] invalid operand: 0000 [#1] > Jun 26 01:55:04 localhost kernel: [17180317.156000] PREEMPT SMP > Jun 26 01:55:04 localhost kernel: [17180317.156000] EFLAGS: 00010202 > (2.6.15-25-686) > Jun 26 01:55:04 localhost kernel: [17180317.156000] > [pg0+434898390/1069184000] usb_serial_disconnect+0x56/0xd0 [usbserial] It's only going to be fixed months from now, I'm afraid. My patch is only going to be complete in 2.6.18 pre, and when Ubuntu picks it is anyone's guess. -- Pete He also said this: > Here is a copy of what is in /var/log/syslog when I unplug my phone from > my laptop w/ the latest ubuntu kernel. I knew about it before. Here's what Linus accepted already: http://www.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=2f8ad9a1b91bc6856860a2fea8b07e0c82c0ad0a Unfortunately, it's not complete, there's a follow-up patch queued: http://ftp.kernel.org/pub/linux/kernel/people/gregkh/gregkh-2.6/gregkh-04-usb /usb-fix-usb-serial-leaks-oopses-on-disconnect.patch BTW, it's not cdc-acm. Note that usb_serial_disconnect was in the traceback. -- Pete 2.6.18-rc1 came out recently, I hope someone can backport the fix (if it exists) from there into the current Ubuntu kernels. Otherwise, every time I unplug my phone I have to reboot to dial out with it or connect any other usb device again. -- USB stack dies when I disconnect my mobile phone's USB cable https://launchpad.net/bugs/31219 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
