I just installed Sabayon 8 KDE amd64 and performed the post-install upgrade using equo as described in the wiki.
I have crackling, noisy sound for the first few seconds the soundcard is used, i.e. during the startup sound. It happens more persistently when listening to music in a media-center session.
It sounds like "digital noise", think of a sped-up old dial-in modem with cracking mixed in. It does not change volume when I change the system volume - i.e. the startup sound's volume changes, noise's volume stays the same.
It seems this is a known problem, I have found a page that suggests putting:
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options snd-hda-intel power_save=0 power_save_controller=N
into /etc/modprobe.d/alsa.conf
which I also tried in this variation:
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options snd_hda_intel power_save=0 power_save_controller=N
but none of these solutions (after reboot, of course) fix the problem.
Some info:
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root@deepthought /home/thomas # uname -a
Linux deepthought 3.2.0-sabayon #1 SMP Sat Feb 11 08:52:29 UTC 2012 x86_64 Intel(R) Core(TM) i7 CPU Q 820 @ 1.73GHz GenuineIntel GNU/Linux
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root@deepthought /home/thomas # lspci -v |grep -i audio
00:1b.0 Audio device: Intel Corporation 5 Series/3400 Series Chipset High Definition Audio (rev 05)
01:00.1 Audio device: nVidia Corporation High Definition Audio Controller (rev a1)
I've changed two sound-specific settings so far:
- 1: changed the "Master Channel" for the kmix-control in the system tray to control
2: disabled system beep by a) blacklisting pcspkr and b) putting "set b off" into .xsession
I'm unsure about 2, I'll revert my changes and reboot to test right after posting this.
Any suggestions/ideas?
Thanks,
cptG