(In reply to Oliver Neukum from comment #7) > (In reply to Takashi Iwai from comment #6) > > Could you check with the latest kernel in OBS Kernel:SLE15-SP4 repo? > > https://download.opensuse.org/repositories/Kernel:/SLE15-SP4/pool/ > > If that does not work, please try the original kernel with > usbcore.autosuspend=-1 > on the kernel command line. I introduced the parameter into YaST (Leap 15.4 kernel 5.14.21-150400.24.11-default x86_64), and the workaround seems to work fine: input devices are working far longer as they were, without failure so far as I'm writing. Thank you.