"Andrew M.A. Cater" <[email protected]> writes: >> Pankaj Jangid <[email protected]> writes: >> >> > When I boot system afresh, the card is visible in the ‘alsamixer’ and in >> > Gnome settings as well. Shown as “Blue” S/PDIF input and output >> > devices. But when system wakes up from sleep (suspended), it doesn’t >> > show the devices. >> > > It might be nothing more than the power handling, sleep modes and USB > enumeration after a laptop goes to sleep. > > If you unplug/replug the USB plug which is the external sound card, is > it magically recognised again?
Thanks Andy, for the reply. I really appreciate this gesture. And I am sorry I wasn’t complete in the original email. I had tried to unplug and replug. But that also doesn’t list the device in ‘alsamixer’ and hence doesn’t work after a suspend/wakeup operation. Is there a way to force the scan of USB sound devices manually if that is not happening automatically? As I had posted earlier that ‘lsusb’ and ‘cat /proc/asound/cards’ do list the device. It is just that ALSA is not seeing it. Regards ~Pankaj
