At Sat, 18 Jan 2014 09:46:22 +0800, Raymond Yau wrote:
2014/1/16 Axel Braun axel.braun@gmx.de
same problem on a ThinkPad T520, sound volume is way
too low - watching movie via loudspeakers is fairly impossible.
Any hint you could give me?
post the output of alsa-info.sh , there is a bug in alsa-driver which
treat
dock headphone and headphone to support surround 4.0
you get low volume because Amp Out vals are 0x3d instead of 0x4a but speaker volumes are at 100% (0dB)
Simple mixer control 'Speaker',0 Capabilities: pvolume pswitch Playback channels: Front Left - Front Right Limits: Playback 0 - 74 Mono: Front Left: Playback 74 [100%] [0.00dB] [on] Front Right: Playback 74 [100%] [0.00dB] [on]
Node 0x10 [Audio Output] wcaps 0xc1d: Stereo Amp-Out R/L Control: name="Speaker Playback Volume", index=0, device=0 ControlAmp: chs=3, dir=Out, idx=0, ofs=0 Control: name="Speaker Playback Switch", index=0, device=0 ControlAmp: chs=3, dir=Out, idx=0, ofs=0 Device: name="CX20590 Analog", type="Audio", device=0 Amp-Out caps: ofs=0x4a, nsteps=0x4a, stepsize=0x03, mute=1 Amp-Out vals: [0x3d 0x3d]
Master is set to -13dB, so this is normal.
Takashi