Re: pbbuttonsd new problems - Problem solved
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
> 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