amixer not setting Master volume at a given percentage value (check with 85% to 90%)

[alsa-project]

amixer not setting Master volume at a given percentage value (check with 85% to 90%)

[cladisch]

The hardware has fewer than 100 steps, so the percent values must be rounded.

[immortalaxay]

The hardware has fewer than 100 steps, so the percent values must be rounded.

When 89% is set, it returns 88%. Let, it is due to round off.
When 88% is set, it returns 85%. It should return 88%, as 88% can be set.

Also check following results

$ amixer -M -c PCH sset PCM 96%
Simple mixer control 'PCM',0
Capabilities: pvolume
Playback channels: Front Left - Front Right
Limits: Playback 0 - 255
Mono:
Front Left: Playback 250 [96%] [-1.00dB]
Front Right: Playback 250 [96%] [-1.00dB]

$ amixer -M -c PCH sset PCM 97%
Simple mixer control 'PCM',0
Capabilities: pvolume
Playback channels: Front Left - Front Right
Limits: Playback 0 - 255
Mono:
Front Left: Playback 251 [96%] [-0.80dB]
Front Right: Playback 251 [96%] [-0.80dB]

$ amixer -M -c PCH sset PCM 98%
Simple mixer control 'PCM',0
Capabilities: pvolume
Playback channels: Front Left - Front Right
Limits: Playback 0 - 255
Mono:
Front Left: Playback 252 [97%] [-0.60dB]
Front Right: Playback 252 [97%] [-0.60dB]

$ amixer -M -c PCH sset PCM 99%
Simple mixer control 'PCM',0
Capabilities: pvolume
Playback channels: Front Left - Front Right
Limits: Playback 0 - 255
Mono:
Front Left: Playback 253 [98%] [-0.40dB]
Front Right: Playback 253 [98%] [-0.40dB]

$ amixer -M -c PCH sset PCM 254
Simple mixer control 'PCM',0
Capabilities: pvolume
Playback channels: Front Left - Front Right
Limits: Playback 0 - 255
Mono:
Front Left: Playback 254 [99%] [-0.20dB]
Front Right: Playback 254 [99%] [-0.20dB]

[perexg]

Fixed in latest alsa-lib / alsa-utils.