Bug 43951
Summary: | Sound in headphone no longer working | ||
---|---|---|---|
Product: | Drivers | Reporter: | Lars Pensjö (lars.pensjo) |
Component: | Sound(ALSA) | Assignee: | Jaroslav Kysela (perex) |
Status: | RESOLVED OBSOLETE | ||
Severity: | normal | CC: | alan, lars.pensjo, tiwai |
Priority: | P1 | ||
Hardware: | All | ||
OS: | Linux | ||
Kernel Version: | 3.2 | Subsystem: | |
Regression: | Yes | Bisected commit-id: |
Description
Lars Pensjö
2012-06-28 16:53:39 UTC
Your mixer setup looks quite strange. Did you adjust properly? Try the following: % amixer -c0 -- set Master unmute -12dB % amixer -c0 -- set Headphone unmute 0dB % amixer -c0 -- set Front unmute 0dB After running these commands, there is still no sound anywhere when connecting the headphones. The output from amixer is: Simple mixer control 'Master',0 Capabilities: pvolume pvolume-joined pswitch pswitch-joined penum Playback channels: Mono Limits: Playback 0 - 64 Mono: Playback 8 [12%] [-42.00dB] [off] Simple mixer control 'Headphone',0 Capabilities: pvolume pswitch penum Playback channels: Front Left - Front Right Limits: Playback 0 - 64 Mono: Front Left: Playback 64 [100%] [0.00dB] [off] Front Right: Playback 64 [100%] [0.00dB] [off] If I run your commands with the headphone already connected, I get: Simple mixer control 'Master',0 Capabilities: pvolume pvolume-joined pswitch pswitch-joined penum Playback channels: Mono Limits: Playback 0 - 64 Mono: Playback 48 [75%] [-12.00dB] [on] Simple mixer control 'Headphone',0 Capabilities: pvolume pswitch penum Playback channels: Front Left - Front Right Limits: Playback 0 - 64 Mono: Front Left: Playback 64 [100%] [0.00dB] [on] Front Right: Playback 64 [100%] [0.00dB] [on] However, no sound anywhere. If I disconnect the headphones at reconnect, I get the same lines as first shown (100%, but off). The weird volume values must be due to PulseAudio. It's no kernel bug. The silence even after adjusting the volume could be a kernel issue. Then give alsa-info.sh output (run with --no-upload option) after correcting the volume. Also try the very latest Linus git tree. A bug regarding the power-map of IDT codecs has been fixed recently after 3.5.0-rc4 release. Ok, I connected the earphones, adjusted volume using amixer according to the three lines shown earlier, and this time there is sound in the ear phones (using 3.2.0-25-generic-pae). Funny, I can't explain why it works this time but not last time. If I disconnect the earphones and connect them again, it still works as expected. After rebooting into 3.2.0-25-generic-pae, everything still works as it should. Something went wrong when upgrading from 3.0.0.16-generic-pae to 3.2.0-25-generic-pae, as I had to do the volume adjustments as specified above. Before doing the volume adjustments shown above, I did go back and forth between 3.0.0.16-generic-pae and 3.2.0-25-generic-pae, with the earphones sounds working and not working every time. As far as I am concerned, this is no longer a bug or problem for me. |