Red Hat Bugzilla – Bug 180465
Switching to text console and back hangs X server
Last modified: 2007-11-30 17:11:23 EST
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Description of problem:
Switching the virtual console to text mode and back leaves the Xorg process unresponsive and the screen white. This problem has appearead in rawhide in the last month, I believe. The box as such is alive and one can connect via ssh to it.
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. see above.
Actual Results: Xorg utilizes 100% CPU. When I connect gdb to Xorg, I get following stack trace:
#0 0x00000036286bd900 in __write_nocancel () from /lib64/libc.so.6
#1 0x0000003628667793 in _IO_new_file_write () from /lib64/libc.so.6
#2 0x0000003628668bef in _IO_new_file_xsputn () from /lib64/libc.so.6
#3 0x000000362865e89b in fwrite () from /lib64/libc.so.6
#4 0x00000000005666a2 in LogVWrite ()
#5 0x000000000056717d in LogVMessageVerb ()
#6 0x0000000000481f2c in xf86VDrvMsgVerb ()
#7 0x00002b59ab2893c2 in sisRestoreExtRegisterLock ()
#8 0x00002b59ab28b2f5 in sisSaveUnlockExtRegisterLock ()
#9 0x00002b59ab28f4d9 in SiS_SetSISTVedgeenhance ()
#10 0x00002b59ab29b3cd in SISAdjustFrame ()
#11 0x00002b59ab29b850 in SISAdjustFrame ()
#12 0x00002b59ab5fa69b in xf86ForceHWCursor ()
#13 0x000000000047f7d1 in xf86InitFBManagerArea ()
#14 0x000000000048c152 in xf86XVScreenInit ()
#15 0x0000000000479714 in xf86Wakeup ()
#16 0x000000000044e2a5 in WakeupHandler ()
#17 0x0000000000559cb4 in WaitForSomething ()
#18 0x000000000044a33a in Dispatch ()
#19 0x0000000000432c95 in main ()
Expected Results: Program should continue.
The last message from the Xorg.0.log file is as follows:
(II) SIS(0): Restoring by setting old mode 0x03
I have tried attaching the log file but it seems the cookies get lost on the
way... I specify the URL instead. I see now it reports five errors:
(EE) SIGIO not blocked at xf86eqEnqueue
Please attach your complete X server log file and config file as individual
uncompressed file attachments using the link below. Note that you must
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Thanks in advance.
Created attachment 124371 [details]
xorg.conf attached with help of konqueror.
Created attachment 124372 [details]
Xorg.0.log before the hang
Created attachment 124373 [details]
Xorg.0.log after the hang
Observe that the first few bytes of the log file get damaged (possibly a side
Thanks. It appears that this is probably a bug in the SiS driver not
saving/restoring properly. Please report the problem in X.Org bugzilla,
at http://bugs.freedesktop.org in the "xorg" component, so that it gets
assigned to the SiS driver maintainer for investigation.
Once you've filed your bug report to X.Org, if you paste the new
bug URL here, Red Hat will continue to track the issue in the
centralized X.Org bug tracker, and will review any bug fixes
that become available for consideration in future updates.
Setting status to "NEEDINFO_REPORTER", and awaiting upstream
bug report URL for tracking.
Thanks in advance.
Reported to bugs.freedesktop.org as:
Thanks. Adding bug to our upstream tracker..