Messages in this thread | | | Date | Sun, 13 Apr 2008 10:53:43 +0200 | From | Pavel Machek <> | Subject | Re: 2.6.25-rc6 regression - hang on resume |
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On Sat 2008-04-12 09:27:42, Soeren Sonnenburg wrote: > On Fri, 2008-04-11 at 23:04 +0200, Pavel Machek wrote: > > On Fri 2008-04-04 08:31:29, Soeren Sonnenburg wrote: > > > On Fri, 2008-04-04 at 01:22 +0200, Rafael J. Wysocki wrote: > > > > The following report is on the current list of known regressions > > > > from 2.6.24. Please verify if the issue is still present in the > > > > mainline. > > > > > > > > > > > > Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=10319 > > > > Subject : 2.6.25-rc6 regression - hang on resume > > > > Submitter : Soeren Sonnenburg <kernel@nn7.de> > > > > Date : 2008-03-25 04:44 (10 days old) > > > > > > Yes. The machine resumes and display stays black using s2ram -f -p > > > (blindly typing reboot etc on keyboard does what is expected). However > > > display comes back on 2.6.24. > > > > Could you get us any debugging output from s2ram? Or maybe even strace > > it in both working and broken case, and comparing them? (You may want > > to disable randomization so that results are comparable). > > I did on 2.6.24 > > strace -ff s2ram >s2ram24.trace 2>&1 > > and .25 > > ???strace -ff s2ram >s2ram25.trace 2>&1 > > with the .24 bringing the display back and .25 not. Files are here > > http://nn7.de/debugging/s2ram24.trace.bz2 > ???http://nn7.de/debugging/s2ram25.trace.bz2
Hmm:
/sys/bus/pci/devices/0000:00:1b.0/irq
contains 21 in one case and 22 in another... as do other interrupts. Is that expected? Can you post /proc/interrupts for both versions?
Hmm, big part of trace is:
vm86old(0xb7f76c8c) = -1 ENOSYS (Function not implemented) vm86old(0xb7f76c8c) = -1 ENOSYS (Function not implemented)
...I wonder why we do it so many times?
And here's the difference. .25 says:
vm86old(0xb809ac8c) = -1 ENOSYS (Function not implemented) vm86old(0xb809ac8c) = -1 ENOSYS (Function not implemented) Error: something went wrong performing real mode call open("/sys/class/graphics", O_RDONLY|O_NONBLOCK|O_LARGEFILE|O_DIRECTORY|0x80000) = -1 ENOENT (No such file or directory) open("/dev/tty", O_RDWR|O_LARGEFILE) = 6 ioctl(6, KDGKBTYPE, 0xbfae8887) = 0
...can you perhaps add printf-s to s2ram to find out what changed? Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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