On Fri, 2004-07-16 at 11:46, Matthias Grimm wrote: > Am Mittwoch, 14. Juli 2004 20:12 schrieb Matthias Grimm: > > In the last time a lot of error reports arrived that pbbuttonsd would crash > from time to time on new 2.6 kernels. The phenomenon occoured after > triggering sleep. In some cases the machine continue to work and pbbuttonsd > didn't react at all. It hanged. > > This problem was difficult to track because the phenomenon was not > deterministic and could only be reproduced by chance. > > But now I got it. To my regret it is a bug in pbbuttonsd. :-( > > The problem occour in conjunction with ALSA and is not limited to kernel 2.6. > Since Kernel 2.6 ALSA is official part of the kernel and many people uses > kernel 2.6 together with ALSA (so am I) so the problem occours more often on > this platform. > > As quick sollution I attached a patch for pbbuttonsd 0.6.2 to this mail. > Unzip > it to your pbbuttonsd 0.6.2 source directory, change to this direchtory and > type: > patch -p1 <pbbuttonsd-0.6.2_1.patch > After compiling and installing the problem should not occour again. An > official release will follow after some additional test time. Look for it on > sourceforge.net because my web site is currently off-line until I moved it to > a new home, sorry. My web host has quited. >
Is this fixed with the pbbuttonsd-0.6.3a/ source? Or should we stick with the 0.6.2.1 version to fix this issue? > Due to an error in the ossmixer module the mixer device could remain open > after first use (usually changing the volume with hotkeys). Normally > pbbuttonsd opens the mixer device only as long as it would be needed. After a > sleep request pbbuttonsd started the pmcs script and this script > launched /etc/apm/alsa on systems using ALSA. This script sent a uncatchable > stop signal to all processes that uses a sound device. If the mixer device > was still open the script /etc/apm/alsa would stop pbbuttonsd. The script > ends normally but the daemon hangs. Sleep mode would not be triggered > anymore. The problem was so difficuil to hunt down because certain conditions > must come together. First pbbuttonsd had to run as daemon, Alsa including the > script /etc/apm/alsa had to be installed on the system, the pmcs-script > 'apm-compat' had to be active and the volume had to be adjusted with the > hotkeys. If all this conditions come true and sleep was triggered (with key, > cover or timer) pbbuttonsd would crash and the machine wouldn't go to sleep. > > That was a lot of explanations and I will finish now. Have a nice weekend, I > will :-) > > Best Regards > Matthias > > > >
