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kikuman · Newbie Joined: 23 Apr 2006 Posts: 8

Im using 2.14 on FC5 and gnome keyboard shortcut for e.g Volume Up, Down etc is changing Master channel , but thats useless, realy many ppl r having this problem and i think solution is simple, because that keybinding is prolly does just "amixer sset 1+" or something similar. Googling DOES give solutions, which r workarounds.
R there any mappings for what gnome does when key is pressed or how to solve this.
(I'll be shocked if the developers never heard about that issue)

Thanks Razz

vuntz · Posted: Wed May 03, 2006 4:00 pm Post subject:

Sorry, but your issue is not clear to me. Maybe you could explain it a bit more?
_________________
Les gens heureux ne sont pas pressés.

kikuman · Newbie Joined: 23 Apr 2006 Posts: 8

Yes, sure .Thanks for reply btw.
There is an option in System > Preferences > Keyboard Shortcuts under "Sound" to assign keys for increasing/decreasing volume, muting and so on.
Assigning keys goes OK . When I press the key I assigned for increasing volume for example, small window shows up and I can see a bar going to the right (indicating that the volume is rising), that all works properly...no complaint.
But the problem is that assinging key doesn't let the user to set the Channel, which to increase/decrease etc. So when I press assigned key it manipulates Master Channel,
which affects nothing ( I can mute Master and there still will be sound, like nothing happened). It would be nice to have an option to change the Channel affected by assigned key, like PCM or Headphone.
May be there is such option, but I don't know about it Embarassed

I noticed while looking for workarounds that to change volume user could use "amixer CHANNEL_NAME sset 1+" (that would increase volume).
But where such mapping files are in gnome remains question.

Thanks again for reply.

und0 · Moderator Joined: 09 Feb 2006 Posts: 1221

shownsama · Newbie Joined: 21 May 2006 Posts: 4

I have the same problem. I've been looking for a solution for a while now with no luck. Apparently there are several people with the same issue but with no solution.

The problem is that on some computers ( such as my laptop), the Master volume control does not effect the headphone volume. In essence, this rendered the multimedia keys usless if you are using headphones. However, the PCM channel is effectively the real master control as it effects both headphone and normal speaker output.

In many programs, you can select which audio channel you wish to use with the volume control. I.E. have it control PCM instead of Master.

The problem is that the gnome volume applet (or maybe gnome is to blame) does not let you change which audio channel it uses. So if you map the multimedia keys to XF86AudioVolumeRaise, etc. they will control the Master channel.

Does that make sense?

if you right click on the speaker icon for the volume applet and choose preferences, it allows you to "Select the device and track to control", but only when you single click the icon. I.e. it has no effect on the channel controled by the multimedia keys.

Personally, I would prefer if the gnome volume applet allowed the selection of volume channel. I recently switched to Gnome because of Xgl. Now I'm trying to configure it to work for my tastes.

So... Any ideas? Is this a bug? Shouldn't choosing a channel in the preferences box also change the channel controled by the multimedia keys? Or shouldn't there atleast be an option in the gconf-editor?

Thanks in advance for help.

und0 · Moderator Joined: 09 Feb 2006 Posts: 1221

shownsama · Newbie Joined: 21 May 2006 Posts: 4

und0 · Moderator Joined: 09 Feb 2006 Posts: 1221

shownsama · Newbie Joined: 21 May 2006 Posts: 4

K. Thanx for the info. Although that bug report seems to be a bit dated. February of 2004. I did some googling and tracked down the location of the file listed in the bug report. It's part of the control-settings package in gnome. I searched the source code and it would seem that the patch never found it way into the source code, or the code has changed significantly enough that it's no longer recogonizable.

I'll keep looking into this, but I'm still curious of changing the channel in the applet changes the effect of the multimedia keys for anyone.

EDIT
I think I found a related bug report already made. 342000. But it's late and I have a long day tomorrow. I'll have to explore more later.

und0 · Moderator Joined: 09 Feb 2006 Posts: 1221

shownsama · Newbie Joined: 21 May 2006 Posts: 4

It seems that the problem is in alsa, but it doesn't appear to be their fault. Apparently there is some confusion in the AC'97 specification. At least this seems to be the source of my problem.

My Sound device

und0 · Moderator Joined: 09 Feb 2006 Posts: 1221

And yes, via82xx uses the AC'97 interface... (=

kikuman · Newbie Joined: 23 Apr 2006 Posts: 8

robert2513 · Newbie Joined: 16 Sep 2006 Posts: 1

sammi84 · Newbie Joined: 18 Nov 2006 Posts: 1

Nope. Still not fixed for me. Mediakeys still only affect the master channel and the master channel is still useless for changing the volume of headsets.

I'm running Ubuntu 6.10 with Gnome 6.16 on a Dell Inspiron 9300 laptop.

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