More information : Problem : Clipping noise - Volume goes down and up fast randomly
In video : http://www.youtube.com/watch?v=8v-eYcQ_gqo&feature=youtu.be Not HD and hard to see but you should be able to see those 3 windows : 1) alsamixer : Surround, Center, LFE and Side goes to 0 and backup to 100 in a split second 2) pavucontrol : Output Devices / Port : this one switches to Headphones and back to Analog Output very fast 3) KDE / System Settings / Multimedia / Phonon / Audio Hardware Setup / Device Configuration : Here it's the Connector that is switching to Headphones then back to Analog Output very fast I uninstalled alsa and pulseaudio, same problem. I uninstalled kmix, problem disappear but I don't have sound anymore. I booted with Linux Mint 14 (both Mate and KDE), same problem right on the LiveCD. I have a dual-boot setup with Windows 7 and this one doesn't reproduce the same problem so there's no problem with my speakers or the cable. This is my motherboard : http://ca.gigabyte.com/products/product- page.aspx?pid=4139#sp lspci -nn | grep -i audio 00:1b.0 Audio device [0403]: Intel Corporation 7 Series/C210 Series Chipset Family High Definition Audio Controller [8086:1e20] (rev 04) cat /proc/asound/cards 0 [PCH ]: HDA-Intel - HDA Intel PCH HDA Intel PCH at 0xf7c30000 irq 47 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1067434 Title: Sound output device keeps changing when using headphones To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1067434/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
