Re: AMT8

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On Fri Apr 17 17:25 , Clemens Ladisch  sent:

>immanuel litzroth wrote:
>> >Apr 13 12:08:39 voodochile kernel: [  169.622067] usb 2-10: new full speed
USB device using ohci_hcd and address 5
>> >Apr 13 12:08:39 voodochile kernel: [  169.844566] usb 2-10: configuration #1
chosen from 1 choice
>> >Apr 13 12:08:39 voodochile kernel: [  169.847594] snd-usb-audio: probe of
2-10:1.0 failed with error -5
>> >Apr 13 12:08:39 voodochile kernel: [  169.847616] snd-usb-audio: probe of
2-10:1.1 failed with error -5
>> >Apr 13 12:08:44 voodochile kernel: [  174.656857] usb 2-9: new full speed USB
device using ohci_hcd and address 6
>> >Apr 13 12:08:44 voodochile kernel: [  174.879643] usb 2-9: configuration #1
chosen from 1 choice
>> >Apr 13 12:08:44 voodochile kernel: [  174.882987] snd-usb-audio: probe of
2-9:1.0 failed with error -5
>> >Apr 13 12:08:44 voodochile kernel: [  174.883013] snd-usb-audio: probe of
2-9:1.1 failed with error -5
>> What's up with that?
>
>I'd guess the driver doesn't claim all the interfaces that the device
>has.  This shouldn't matter.
>
>> Then if I do and aplaymidi -l it lists the following ports:
>>  40:0    AMT8                             AMT8 MIDI 1
>>  40:1    AMT8                             AMT8 MIDI 2
>>  40:2    AMT8                             AMT8 MIDI 3
>>  40:3    AMT8                             AMT8 MIDI 4
>>  40:4    AMT8                             AMT8 MIDI 5
>>  40:5    AMT8                             AMT8 MIDI 6
>>  40:6    AMT8                             AMT8 MIDI 7
>>  40:7    AMT8                             AMT8 MIDI 8
>>  40:8    AMT8                             AMT8 Broadcast
>>  44:0    AMT8                             AMT8 MIDI 1
>>  44:1    AMT8                             AMT8 MIDI 2
>>  44:2    AMT8                             AMT8 MIDI 3
>>  44:3    AMT8                             AMT8 MIDI 4
>>  44:4    AMT8                             AMT8 MIDI 5
>>  44:5    AMT8                             AMT8 MIDI 6
>>  44:6    AMT8                             AMT8 MIDI 7
>>  44:7    AMT8                             AMT8 MIDI 8
>>  44:8    AMT8                             AMT8 Broadcast
>> Is it possible to have other names generated for these ports through
>> some magic?
>
>You could add some entries to the snd_usbmidi_port_info array in the
>driver source ...
>
>> Preferably each port would be named after the synth connected to it.
>
>Changing port names at runtime isn't supported by the driver.
>
>> Then when I play the devices I get messages in /var/log/messages saying
>> Apr 11 23:03:56 voodochile kernel: [14700.085974] rtc: lost 28 interrupts
>> Apr 11 23:04:26 voodochile kernel: [14730.054964] rtc: lost 28 interrupts
>> Apr 11 23:04:56 voodochile kernel: [14760.023963] rtc: lost 28 interrupts
>> What's up with that?
>
>Every thirty seconds, something on your computer eats some CPU and
>disables all interrupts for about 27 milliseconds.  If you have a laptop,
>this it probably some fan control or power management stuff done by the
>BIOS.
>
>
>Best regards,
>Clemens

I have one of these and a Unitor 8 MK II, I don't experience this problem at
all.. but it is on a desktop


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