Red Hat Bugzilla – Bug 228191
Return from VT switch very very bad (modesetting)
Last modified: 2007-11-30 17:11:56 EST
This bug may well be closely related to Bug #228045
Description of problem:
Using i855GM, intel driver.
Low refersh rate on the LCD flat panel (laptop display). I didn't even think
LCD's could flicker...
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. Start X.
Low refresh flicker
Solid LCD goodness
Thanks for the bug report. We have reviewed the information you have provided
above, and there is some additional information we require that will be helpful
in our diagnosis of this issue.
Please attach your X server config file (/etc/X11/xorg.conf) and X server log
file (/var/log/Xorg.*.log) to the bug report as individual uncompressed file
attachments using the bugzilla file attachment link below.
Could you please also try to run without any /etc/X11/xorg.conf whatsoever and
let X11 autodetect your display and video card? Attach to this bug
/var/log/Xorg.0.log from this attempt as well, please.
We will review this issue again once you've had a chance to attach this information.
Thanks in advance.
Created attachment 148278 [details]
Lifebook P7010 Xorg.0.log
I too can see this kind of effect.
*** This bug has been marked as a duplicate of 202476 ***
202476 is about text mode being scrambled on VT switch. This bug is about X
going haywire on return from VT switch.
Same here on a "DELL Optiplex 745" with 965Q onboard graphics. For both
"i810" and "intel" driver, switching from "X" to a virtual console and
back several times results in a black or a dark blue flickering display.
Even "ctrl-alt-bckspc" won't restore normal operation. One has to reboot
the system to obtain a working "X" environment again. This holds for the
latest packages, namely:
According to the "README" file included in the source tarball there are
known issues with "VT" switching, but the cited bug report
has been closed.
I have the same problem with a Dell Optiplex 745, and can also get it to occur
on a system with a supermicro 965G based motherboard.
It also occurs with the Fedora 7 test 3 live CD's, both x86_64 and i386 versions
(on the Optiplex anyway, I haven't checked the supermicro system).
On Thinkpad X60, return from VT1->VT7 results in 'logout of graphical session'.
That is, I get gdm greeter screen to login again.
I haven't noticed this running in 'i810' mode, just 'intel' mode.
Found this in /var/log/gdm/:0.log.1:
0: /usr/bin/Xorg(xf86SigHandler+0x81) [0x80d2041]
2: /usr/bin/Xorg [0x80d8101]
3: /usr/bin/Xorg [0x80d85b5]
4: /usr/bin/Xorg(TraverseTree+0x1e) [0x807321e]
5: /usr/bin/Xorg(WalkTree+0x38) [0x80732a8]
6: /usr/bin/Xorg [0x80d8648]
7: /usr/lib/xorg/modules/extensions//libglx.so [0x9078fa]
8: /usr/bin/Xorg(xf86Wakeup+0x3bd) [0x80d375d]
9: /usr/bin/Xorg(WakeupHandler+0x59) [0x808d3f9]
10: /usr/bin/Xorg(WaitForSomething+0x1ae) [0x81b45ae]
11: /usr/bin/Xorg(Dispatch+0x8d) [0x80891ed]
12: /usr/bin/Xorg(main+0x495) [0x8071045]
13: /lib/libc.so.6(__libc_start_main+0xe0) [0x47af6ef0]
14: /usr/bin/Xorg(FontFileCompleteXLFD+0x1e5) [0x8070361]
Fatal server error:
Caught signal 11. Server aborting
Upgrading to "xorg-x11-drv-i810-1.6.5-19.fc7" and setting the driver
to "intel" solves the issue completely for a "DELL Optiplex 745"
sporting a "965Q" onboard graphics.
On xorg-x11-drv-i810-2.0.0-4.fc7 I'm not seeing this (and I've not seen this for
quite a while now), so let's close this out.