On 23/05/06 15:24 +0200, Rodolfo Giometti wrote: > Hello, > > When I put the system to sleep and then it wakes up everything works > well _if_ the USB key is not mounted before the sleep. For instance, > if I mount partition "/dev/sda1" (first USB key partition) and then go > to sleep, at wake up the system forgets device "/dev/sda" and > registers a new device "/dev/sdb" so, obviously, the filesystem > previously mounted is not accessible anymore. Thats exactly right - USB sleep is a very delicate and broken procedure. Basically, the controller seems to be giving up and re-enumerating everything. > My question is: is that correct since the userland, before going to > sleep, should umount all external filesystems or it's a bug? :) The userland technically *shouldn't* have to unmount the filesystems, but its the safest option we have - between enumeration issues, and the age old problem of unplugging the external device while in sleep - its just better to unmount the device before heading for nap time (or mount the thing with '-a' so data isn't lost). Is that ideal? Of course not - but welcome to the wonderful world of USB in Linux. Jordan
