Had a few problems with Fedora 12, so thought I’d make a note of some fudges fixes I’ve found:

1. Lag issue with Skype – people hear you a couple of seconds after you talk, or you press a number button and don’t hear the sound for a couple of seconds. No problem on F10.

Discussed in this forum thread, fixes from here seemed to work for me – or a fudge is to prevent Skype being the first program to use PulseAudio.

In /etc/pulse/default.pa:

load-module module-udev-detect tsched=0

In /etc/pulse/daemon.conf:

realtime-scheduling = yes
default-fragments = 8
default-fragment-size-msec = 5

Not sure if this one actually helped, look up your card driver here, my model I believe fits 120 (5.1 plus SPDIF):

echo 'options snd_hda_intel model=120' > /etc/modprobe.d/snd_hda_intel.conf

2. Only one print job works – I found I could only print once to my Samsung ML-2510 via Linksys printserver, and then it would hang. The issue seems to be a bug in the IPP support in CUPS supplied with F12.

The solution was to switch to LPD/LPR. It seems the CUPS is hanging waiting for a “job finished” message from the printer, which IPP doesn’t support. IPP via CUPS worked fine on F10 and Ubuntu 9.04

I’m sure there was a third problem, maybe I’ll remember and add it later.