you have to provide log to find out how pulseaudio calculate 20% some of your volume controls are not defined in
http://cgit.freedesktop.org/pulseaudio/pulseaudio/tree/src/modules/alsa/mixer/paths Simple mixer control 'PCM Front',0 Capabilities: pvolume Playback channels: Front Left - Front Right Limits: Playback 0 - 100 Mono: Front Left: Playback 100 [100%] [0.00dB] Front Right: Playback 100 [100%] [0.00dB] Simple mixer control 'PCM Center',0 Capabilities: pvolume pvolume-joined Playback channels: Mono Limits: Playback 0 - 100 Mono: Playback 0 [0%] [-99999.99dB] Simple mixer control 'PCM LFE',0 Capabilities: pvolume pvolume-joined Playback channels: Mono Limits: Playback 0 - 100 Mono: Playback 0 [0%] [-99999.99dB] Simple mixer control 'PCM Surround',0 Capabilities: pvolume Playback channels: Front Left - Front Right Limits: Playback 0 - 100 Mono: Front Left: Playback 0 [0%] [-99999.99dB] Front Right: Playback 0 [0%] [-99999.99dB] the volume controls only have 100 steps when high_res_gpr_volume : N https://git.kernel.org/cgit/linux/kernel/git/tiwai/sound.git/commit/sound/pci/emu10k1/emufx.c?id=4daf7a0c0b3dd3c2e2ec829ecee8608d04d67773 high_res_gpr_volume : Y , there are 0x7fffffff steps you master volume is only 10% Controls : 194 Simple ctrls : 30 Simple mixer control 'Master',0 Capabilities: pvolume pvolume-joined Playback channels: Mono Limits: Playback 0 - 100 Mono: Playback 10 [10%] [-36.00dB] Simple mixer control 'PCM',0 Capabilities: pvolume cvolume Playback channels: Front Left - Front Right Capture channels: Front Left - Front Right Limits: Playback 0 - 100 Capture 0 - 100 Front Left: Playback 100 [100%] [0.00dB] Capture 0 [0%] [-99999.99dB] Front Right: Playback 100 [100%] [0.00dB] Capture 0 [0%] [-99999.99dB] Simple mixer control 'Front',0 Capabilities: pvolume Playback channels: Front Left - Front Right Limits: Playback 0 - 100 Mono: Front Left: Playback 100 [100%] [0.00dB] Front Right: Playback 100 [100%] [0.00dB] Simple mixer control 'Surround',0 Capabilities: pvolume Playback channels: Front Left - Front Right Limits: Playback 0 - 100 Mono: Front Left: Playback 100 [100%] [0.00dB] Front Right: Playback 100 [100%] [0.00dB] Simple mixer control 'Center',0 Capabilities: pvolume pvolume-joined Playback channels: Mono Limits: Playback 0 - 100 Mono: Playback 100 [100%] [0.00dB] Simple mixer control 'LFE',0 Capabilities: pvolume pvolume-joined Playback channels: Mono Limits: Playback 0 - 100 Mono: Playback 100 [100%] [0.00dB] -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to pulseaudio in Ubuntu. https://bugs.launchpad.net/bugs/1321485 Title: No change to volume in lowest 20% of control Status in “pulseaudio” package in Ubuntu: Incomplete Bug description: Utopic Unicorn fully updated. Volume control works fine down to ~20% thereafter no control over volume until sound is muted. Edited /etc/pulse/default.pa load-module module-udev-detect line to load-module module-udev-detect ignore_dB=1 volume controls now work down to where I would expect them to ProblemType: Bug DistroRelease: Ubuntu 14.10 Package: pulseaudio 1:4.0-0ubuntu11 ProcVersionSignature: Ubuntu 3.15.0-1.5-generic 3.15.0-rc5 Uname: Linux 3.15.0-1-generic x86_64 NonfreeKernelModules: nvidia ApportVersion: 2.14.2-0ubuntu4 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC2: hob 3480 F.... pulseaudio /dev/snd/controlC0: hob 3480 F.... pulseaudio /dev/snd/pcmC1D0p: hob 3480 F...m pulseaudio /dev/snd/controlC1: hob 3480 F.... pulseaudio CurrentDesktop: XFCE Date: Wed May 21 00:22:54 2014 InstallationDate: Installed on 2014-05-12 (8 days ago) InstallationMedia: Xubuntu 14.10 "Utopic Unicorn" - Alpha amd64 (20140510) SourcePackage: pulseaudio UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 06/21/2012 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: FE dmi.board.asset.tag: To be filled by O.E.M. dmi.board.name: H61M-S2PV dmi.board.vendor: Gigabyte Technology Co., Ltd. dmi.board.version: To be filled by O.E.Mx dmi.chassis.asset.tag: To Be Filled By O.E.M. dmi.chassis.type: 3 dmi.chassis.vendor: Gigabyte Technology Co., Ltd. dmi.chassis.version: To Be Filled By O.E.M. dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrFE:bd06/21/2012:svnGigabyteTechnologyCo.,Ltd.:pnTobefilledbyO.E.M.:pvrTobefilledbyO.E.M.:rvnGigabyteTechnologyCo.,Ltd.:rnH61M-S2PV:rvrTobefilledbyO.E.Mx:cvnGigabyteTechnologyCo.,Ltd.:ct3:cvrToBeFilledByO.E.M.: dmi.product.name: To be filled by O.E.M. dmi.product.version: To be filled by O.E.M. dmi.sys.vendor: Gigabyte Technology Co., Ltd. modified.conffile..etc.pulse.default.pa: [modified] mtime.conffile..etc.pulse.default.pa: 2014-05-21T00:16:41.541710 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/pulseaudio/+bug/1321485/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
