Please post the ouput of "amixer" (or "amixer -c 1" or any other number that corresponds to the affected soundcard).

Same thing here. whatever I do, it seems the master channel is set randomly at startup (front/front mic/line) on my HDAintel (I've got only one sound card)

will attach my amixer output
hope this helps

Created attachment 20956 [details]
my amixer output

Very interesting. Currently I have no idea wha is happening (even ager looking at the aixer output).
Could you please submit your KMix configuratoon here (~/.kde/share/config/kmixrc)?

AllowDocking=true
Labels=true
MasterMixer=ALSA::CA0106:1
MasterMixerDevice=11
Menubar=true
Orientation=Horizontal
Position=640,307
Size=1280,409
Tickmarks=true
TrayVolumeControl=true
ValueStyle=None
Visible=false
startkdeRestore=true

[0]
Mixer_Name_Key=CA0106
View.input.Devs=5
View.output.Devs=10
View.switches.Devs=3

[1]
Mixer_Name_Key=C-Media USB Headphone Set \s
View.input.Devs=1
View.output.Devs=1
View.switches.Devs=1

[General]
ShowAlternativeShortcutConfig=false

[Notification Messages]
systemtrayquitKMix=false

[View.input.0.Dev0]
Show=true
Split=false

[View.input.0.Dev0.Capture]
Show=true
Split=false

[View.input.0.Dev1]
Show=true
Split=false

[View.input.0.Dev2]
Show=true
Split=false

[View.input.0.Dev3]
Show=true
Split=false

[View.input.0.Dev8]
Show=true
Split=false

[View.input.0.Dev9]
Show=true
Split=false

[View.input.1.Dev0]
Show=true
Split=false

[View.input.1.Dev1]
Show=true
Split=false

[View.input.1.Dev2]
Show=true
Split=false

[View.input.1.Dev8]
Show=true
Split=false

[View.output.0.Dev0]
Show=true
Split=false

[View.output.0.Dev10]
Show=true
Split=false

[View.output.0.Dev11]
Show=true
Split=false

[View.output.0.Dev12]
Show=true
Split=false

[View.output.0.Dev13]
Show=true
Split=false

[View.output.0.Dev14]
Show=true
Split=false

[View.output.0.Dev4]
Show=true
Split=false

[View.output.0.Dev5]
Show=true
Split=false

[View.output.0.Dev6]
Show=true
Split=false

[View.output.0.Dev6.keys]
Decrease volume=XF86AudioLowerVolume
Increase volume=XF86AudioRaiseVolume
Toggle mute=XF86AudioMute

[View.output.0.Dev7]
Show=true
Split=false

[View.output.0.Dev8]
Show=true
Split=false

[View.output.0.Dev9]
Show=true
Split=false

[View.output.1.Dev0]
Show=true
Split=false

[View.output.1.Dev10]
Show=true
Split=false

[View.output.1.Dev11]
Show=true
Split=false

[View.output.1.Dev12]
Show=true
Split=false

[View.output.1.Dev13]
Show=true
Split=false

[View.output.1.Dev2]
Show=true
Split=false

[View.output.1.Dev4]
Show=true
Split=false

[View.output.1.Dev5]
Show=true
Split=false

[View.output.1.Dev6]
Show=true
Split=false

[View.output.1.Dev7]
Show=true
Split=false

[View.output.1.Dev9]
Show=true
Split=false

[View.switches.0.Dev14]
Show=true
Split=true

[View.switches.0.Dev15]
Show=true
Split=true

[View.switches.0.Dev16]
Show=true
Split=true

[View.switches.0.Dev3]
Show=true
Split=true

[View.switches.0.Dev4]
Show=true
Split=true

[View.switches.1.Dev1]
Show=true
Split=true

[View.switches.1.Dev14]
Show=true
Split=true

[View.switches.1.Dev15]
Show=true
Split=true

[View.switches.1.Dev3]
Show=true
Split=true



If you stop kmilo from running you can configure the kmixrc as you want 

The above configuration works fine with kmilo stoped. 

An this is the amixer -c 1

Simple mixer control 'Mic',0
  Capabilities: pvolume pvolume-joined cvolume pswitch pswitch-joined cswitch cswitch-joined
  Playback channels: Mono
  Capture channels: Mono
  Limits: Playback 0 - 32 Capture 0 - 16
  Mono: Playback 23 [72%] [34.50dB] [off] Capture 0 [0%] [0.00dB] [on]
Simple mixer control 'Auto Gain Control',0
  Capabilities: pswitch pswitch-joined
  Playback channels: Mono
  Mono: Playback [on]
Simple mixer control 'Speaker',0
  Capabilities: pvolume pswitch pswitch-joined
  Playback channels: Front Left - Front Right
  Limits: Playback 0 - 151
  Mono:
  Front Left: Playback 2 [1%] [-28.01dB] [on]
  Front Right: Playback 2 [1%] [-28.01dB] [on]

Due to the hint "If you stop kmilo from running you can configure the kmixrc as you want ", I now do understand the issue. It is a recently (January 2007) introduced bug in KMilo. There is another bug report about that. I'll mark this as a dup. 

*** This bug has been marked as a duplicate of 149487 ***