|Summary:||[usb] [reboot] instant system reboot when unmounting a powered off/unplugged+replugged USB device|
|Product:||Base System||Reporter:||Oliver Lehmann <oliver>|
|Component:||usb||Assignee:||freebsd-usb (Nobody) <usb>|
|Severity:||Affects Only Me||CC:||oliver|
Description Oliver Lehmann 2005-07-30 11:50:19 UTC
1. I mount my digitalcamera (USB) via mount_msdosfs 2. My camera goes offline after some time of inactivity 3. Trying to unmount the camera when it went off causes an instantly system reboot. The same happend with an USB harddrive I attach, mount, power off, unmount -> reboot "power off" can be replaced by unplug and replug - unmounting it then causes a reboot too Fix: no idea How-To-Repeat: see description
Comment 1 Mark Linimon 2005-07-30 16:26:06 UTC
Responsible Changed From-To: freebsd-bugs->freebsd-usb Reassign to appropriate mailing list.
Comment 2 Simon L. B. Nielsen 2005-07-30 16:56:47 UTC
> 1. I mount my digitalcamera (USB) via mount_msdosfs > 2. My camera goes offline after some time of inactivity > 3. Trying to unmount the camera when it went off causes an instantly system reboot. This very much sound like the known issue with removing the device under a mounted file system which blows up. Currently the only known answer for that is "Don't do that". It's not trivial to fix, but of cause it would be very nice for this to not blow up. There are at least a few other PR's about unmounting a mounted file system which can be found by searching GNATS. Of cause this could be a different issue. -- Simon L. Nielsen
Comment 3 Mark Linimon 2008-01-26 00:19:49 UTC
State Changed From-To: open->suspended This is a well-known error: there are underlying structures in the kernel that haven't been made to understand that drives can go away. This assumption has been false for years. However, the work required is going to be quite detailed; no quick workarounds are available (they've been discussed and rejected). So, mark this one as suspended for now.
Comment 4 Eitan Adler 2011-09-29 15:36:28 UTC
State Changed From-To: suspended->closed The cause of this issue is believed to have been in 7.2+