ubuntu-x-swat team mailing list archive

[Greg Pelly <664646@xxxxxxxxxxxxxxxxxx>]

>1) A wavy display when driving the external monitor at 1024x768.
>- I suspect that adding radeon.new_pll=0 (or radeon.new_pll=1) to GRUB_CMDLINE_LINUX_DEFAULT="quiet splash" and >running update-grub will fix this, as this changes the algorithm for selecting the clock frequencies to drive the display at.

I tried 0 and 1 for radon.new_pll, running sudo update-grub after each
one. Both are still blurry. I should not have to reboot the machine or
logout, right?

2) Looking in your Xorg.0.log it's apparent that when X starts up it is
unable to probe your external monitor correctly, and so falls back on
some standard mode options which is why X picks 1024x768 for both your
displays - it thinks this is the best mode they have in common. This is
particularly strange because later in the log it's clear that it
successfully probes your external display.

I have a KVM switch that the monitor is connected to. It's possible that
when those lines were written to the log, I had the KVM set to use the
other computer (not unlikely, since I can't currently do much with that
laptop, I'm not really using it). For the record, I get the same visible
behavior with and without the KVM.  If you'd like me try rebooting with
the KVM set to this machine, let me know.


>3) When changing the monitor settings to extended desktop, something picks a mode that the monitor can't properly display. I >can't tell from your logs what settings you've tried to set, so it would be good to get a little more information here:
 >* What tool are you using to enable extended desktop? System→Preferences→Monitors?

YES

> * What resolution are you specifying for the second monitor?

1920x1080, aspect ratio 16:9)

> * If the same behaviour occurs when you have Desktop Effects disabled.

YES. (I went to System -> Appearance -> Visual Effects and selected
"None". Same behavior.)

-- 
system cannot display extended desktop on Samsung 2333sw
https://bugs.launchpad.net/bugs/664646
You received this bug notification because you are a member of Ubuntu-X,
which is subscribed to xorg in ubuntu.