>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 Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
