the sound is distorted after I installed an old tv tuner card (sadly I don't the model). It is from an acer apire e380. I get an error message when I boot: Unknown header type 7f. Ignore device You don't have noise until you play a sound. My theory is that if device information and block devices in /dev are inconsistent the bug appears
ok, I found the model, and I "fixed" the problem by including the driver. Philips Semiconductors SAA7133/SAA7135 Video Broadcast Decoder (rev d1) But somehow the bug still apears sometimes. And sometimes remains over reboots. And sometimes just disappear. Also I found out why the sound is distorted: left and right channel were mixed to a mono channel (frontleft-testsound was hearable on the right side and the way around). It seems as if a memory corruption takes place. Related bugs are: https://bugs.freedesktop.org/show_bug.cgi?id=48306 https://bugs.freedesktop.org/show_bug.cgi?id=55438 (sorry for posting a second bug related to this problem)
It seems as if shm makes some problems.After using the command the sound gets normal (tests needed to be sure; it could be a coincindence): pulseaudio --cleanup-shm
test failed. Again there is the problem with the channel map and using the command didn't help. Additional information: What I used: pulseaudio git commit f0432ce6aedca5956f6086824120bb03559e6534 on archlinux Ah another strange thing: the normal speakers work flawless, just the headphones have this problem. Also the jack detection doesn't work anymore
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