Sorry, mis-post.
On Tue, Aug 28, 2007 at 08:50:00AM +0200, Clemens Ladisch wrote:
bmaControls( 0) 0x15 Mute Bass Treble bmaControls( 1) 0x02 Volume bmaControls( 2) 0x02 Volume bmaControls( 3) 0x00 bmaControls( 4) 0x00 bmaControls( 5) 0x00 bmaControls( 6) 0x00These descriptors say that there is a two-channel volume control that applies to the front channels, but I guess it really affects all channels.
Please show the output of "amixer contents" for this card.
numid=3,iface=MIXER,name='Tone Control - Bass' ; type=INTEGER,access=rw------,values=1,min=0,max=10,step=0 : values=5 numid=4,iface=MIXER,name='Tone Control - Treble' ; type=INTEGER,access=rw------,values=1,min=0,max=10,step=0 : values=5 numid=1,iface=MIXER,name='PCM Playback Switch' ; type=BOOLEAN,access=rw------,values=1 : values=on numid=2,iface=MIXER,name='PCM Playback Volume' ; type=INTEGER,access=rw---R--,values=2,min=0,max=49,step=0 : values=48,48 | dBscale-min=-49.00dB,step=1.00dB,mute=0
... HID Device Descriptor: bLength 9 bDescriptorType 33 bcdHID 1.00 bCountryCode 0 Not supported bNumDescriptors 1 bDescriptorType 34 Report wDescriptorLength 172 Report Descriptor: (length is 172) Item(Global): Usage Page, data= [ 0x0c ] 12 Consumer Item(Local ): Usage, data= [ 0x01 ] 1 Consumer Control Item(Main ): Collection, data= [ 0x01 ] 1 Application Item(Global): Usage Page, data= [ 0x0c ] 12 Consumer Item(Local ): Usage, data= [ 0xe2 ] 226 Mute Item(Local ): Usage, data= [ 0xe9 ] 233 Volume Increment ...
This describes an input device that reports 'key' presses to the computer. I guess the control panel and remote control don't have a direct effect but expect the computer to explicitly change mixer controls when a key is pressed.
Since it works fine in Windows without any non-ms software, would this imply that this is somewhat standard behavior?
However, this shouldn't prevent alsamixer from working.
It might be possible that the mixer controls don't have many steps and that the step size used by alsamixer is so small that the device rounds the setting back to the old position. Please try PageUp/Down or Home/ End instead of Up/Down keys.
PgUp/PgDown don't do any better on any controls. I seem to be able to drop the PCM volume to nothing in practice with End, but Home won't restore it. Up/Down immediately brings it back up to 100%. The LED's on the control reflect this btw, but alsamixer still reports 98%.