Red Hat Bugzilla – Bug 381391
KDE blinks second monitor on and off on a one second interval
Last modified: 2007-11-30 17:12:22 EST
I ran 'software updater' today and restarted my machine. The second monitor
started blinking on and off at about a one second rate.
Eventually I figured out that if I end the KDE session and log in using GNOME
that everything is just fine.
It is only under KDE that the monitor blinks on and off.
VERSION: Fedora 7 (with Nov 13 updates)
HOW REPRODUCIBLE: Happens every time
LAPTOP PC MODEL: Toshiba Satellite M45-S269
SECOND VIDEO CARD ADAPTER: I use two different VGA adapters, one at work and one
Work VGA Adapter: Targus ACP50US
Home VGA Adapter: USB2.0VGA
Both adapters connect via USB
1) Everything was working fine until I ran software updater today.
2) I have tried four different monitors and all act the same way.
3) I use two different USB-VGA adapters (see above). KDE blinks the display the
same for either adapter.
4) If I use GNOME, everthing is just fine.
Created attachment 257581 [details]
xorg.conf (don't know if you need this, it worked fine before I updated)
Pretty wild setup and symptoms. I'm stumpted.
Maybe take this to kde-linux ml
or bugs.kde.org to see if anyone from upstream kde has comment?
I am not sure what you mean by 'wild':
1) Laptops are replacing desktops and it is very common for people to lug their
laptop home everyday to work at night after things quite down.
2) Because laptop screens are so small it is common for people to hook a second
(or even third) monitor to their laptop.
3) Expanding laptops via USB is a widespread practice. The Targus USB Hub that
I use is sold at both Circuit-City and Best-Buy as a cheap and convenient way of
adding an additional monitor to a laptop.
4) My xorg.conf file is rather vanilla and shouldn't be surprising to anyone who
has worked with X11 before.
The only thing 'wild' about this is the way I feel when I am trying to get work
done and my monitor is blinking on and off like Christmas tree lights. I very
much prefer KDE over GNOME, but have to use GNOME now because KDE seems broken.
P.S. Maybe it could be the SISUSB driver?
So lets close this bug and forget about it. In resolution put something like
'brain seizure' or 'temporary stupidity' or something similar. In any case, it
is all fixed up now.