Red Hat Bugzilla – Bug 437992
External HP LP3065 monitor w/ Thinkpad T60w will not light up
Last modified: 2012-04-17 16:07:48 EDT
I am using the radeon-tp driver with an ATI Technologies Inc R580 [Radeon X1900
XT] video card. When X starts all I get is a blinking green light on the
monitor. The vga monitor I have plugged in via to the other dvi port works
fine. If I only have the HP plugged in X I see nothing and the whole system
appears to hang (keyboard lights stop working). I will attach two X logs: one
with both monitors plugged in and one with only the HP.
Created attachment 298410 [details]
Xorg log with both monitors plugged in
Created attachment 298411 [details]
xorg log with only the HP plugged in
I am partially an idiot. The LP3065 only does 1280x800 or 2560x1600. Once I
set my display resolution to 1280x800 the HP lit up. Works now. Now to get
So, is this still a problem?
Confusing, but not a problem any more.
thanks a lot
Reopening after more clarification on expected results. Also complicated by
differences between snap2 and snap3 behavior. Now testing on snap3
The real bug is that X should find 1280x800 as a common mode and use that. It
does not. LVDS is at 1680x1050. Manually changing res with xrandr to 1280x800
lights up the external monitor which proves that there is a common mode.
In snap 2 the external monitor lit up even if the mode was not 1280x800. It
just displayed part of the 1680x1050 screen.
No further hardware enablement updates are planned for RHEL5's X stack. If this issue remains in RHEL6, please update the affected product version and reopen this bug.