On Sun, Mar 28, 2021 at 12:25:27PM +0200, Martin Kepplinger wrote: > hi, > > In short: there are SD cardreaders that send MEDIA_CHANGED on > (runtime) resume. We cannot use runtime PM with these devices as > I/O always fails. I'd like to discuss a way to fix this > or at least allow us to work around this problem: In fact, as far as I know _all_ USB SD card readers send Media Changed notifications on resume. Maybe there are some that don't, but I haven't heard of any. Alan Stern