Alexandre Ratchov writes: > On Wed, Sep 25, 2019 at 05:15:22PM +0100, [email protected] wrote: > > I have a similar problem to Alexander Hof with a presonus audio usb > > device, where attaching it reports 'only one AC iface allowed' and the > > device remains (apparently totally) inaccessible. > > > > dmes and lsusb included below. > > > > According to dmesg, this is 6.5, which doesn't contain the fix for > this problem. Could you try the device on a -current system?
I did look through the post 6.5 changes in CVS but couldn't see anything relevent, possibly for reasons that will become clear. > Programmable clocks are OK, the comment states that we don't support > multiple clock sources simultaneously. When audio starts, all parts of > the device must be clocked by the same clock source. > > Pro audio interfaces use necessarily a single clock because otherwise > they wouldn't be unstable in DAWs and/or for real-time effects. > > FWIW, I've never seen -- or even heard of -- devices using multiple > clock sources simultaneously. Good, because that was a complete red herring. The _other_ instance of '%s: only one AC iface allowed' is the one associated with the fault, in uaudio_process_conf(). Perhaps the error message at the end of uaudio_process_ac() could read '%s: only one distinct clock source allowed'? There is good news and bad news about -current. The good news is that the upgrade was seamless and the device is registered without reporting an error. The bad news is that I'd eventually managed to notice the empty (?) control interface and skip it, but it still didn't/doesn't work: uaudio0 at uhub3 port 2 configuration 1 interface 1 "PreSonus AudioBox USB 96" rev 2.00/1.12 addr 4 uaudio0: class v2, high-speed, async, channels: 2 play, 2 rec, 0 ctls audio1 at uaudio0 umidi0 at uhub3 port 2 configuration 1 interface 4 "PreSonus AudioBox USB 96" rev 2.00/1.12 addr 4 umidi0: (genuine USB-MIDI) umidi0: out=1, in=1 midi0 at umidi0: <USB MIDI I/F> ugen1 at uhub3 port 2 configuration 1 "PreSonus AudioBox USB 96" rev 2.00/1.12 addr 4 ludmilla$ audioctl -f /dev/audioctl1 name=uaudio0 mode= pause=0 active=0 nblks=2 blksz=960 rate=48000 encoding=s16le play.channels=2 play.bytes=0 play.errors=0 record.channels=2 record.bytes=0 record.errors=0 ludmilla$ mixerctl -f /dev/mixer1 record.enable=sysctl ludmilla$ sysctl |grep -e mix -e audio kern.audio.record=0 And from mplayer with AUDIODEVICE=snd/1: ... ao2: can't open sndio ... Matthew
