[sane-devel] Mac OS X: make errors
louis at lagendijk.xs4all.nl
Thu Mar 26 20:13:31 UTC 2009
On Thu, 2009-03-26 at 12:16 -0700, Peter Schoenrank wrote:
> My apologies for my tardy reply. I recently upgraded from Mac OS X
> 10.3 to 10.5, and I have been busy learning about the (sometimes
> idiotic) differences.
> On 09-Mar-25, at 14:00, Nicolas Martin wrote:
> > Are you sure you got all the log trace in the scanimage.log file after
> > the scanimage -T command ?
> I am sure that Activity Monitor showed scanimage using 0.0 CPU for a
> very long time before I restarted my Mac.
> I had to restart: nothing else I tried would stop the scanimage
> process. kill -9 and sudo killall didn’t work. Quit and Force Quit in
> Activity Monitor did not work. Closing the Terminal window didn’t
> work. Logging out and back in didn’t work.
This makes it sound like a case where libusb hangs somewhere in a
OS-call where the OS crashes/hangs. From what I have seen on Linux an
application may become unresponsive when an OS-call does not return. I
seem to recall that all Macs have a multi-core processor. Could you
please check the system log AFTER the hang BEFORE you restart the Mac?
Mattias, do you have seen other libusb/Mac kernel error reports?
> > Looks like it suddenly hangs (in libusb), but no error is output.
See above, Sane would not get back in control after a kernel crash/oops
type of error.
> > Do you get a core dump in /var/log/syslog or in /var/log/messages ?
> No. I do not have a /var/log/syslog or a /var/log/messages.
> /var/log/system.log does not go back that far and I don’t seem to have
> any old system.logs. Mac OS X 10.3 kept old logs around; why 10.5
> doesn’t seem to is yet another 10.5 peculiarity for me to investigate,
Could you please check the system log WHILE starting the scan? I would
guess that we are hanging in the kernel space (hence the
non-interruptable state of the application) I would hope that there is
something in the system log BEFORE the reboot
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