Switched to ATI Radeon

Some time ago I mounted my old monitor to the wall and configured my system for dual head. With NVidia 7300GT card setup was easy — Twinview handled it quite ok after fixing configuration so panels were properly setup and located:

  • 24″ on the left with 1920×1080 resolution as primary display
  • 20″ on the right with 1680×1050

My monitor setup

But after few days I decided that enough is enough. From time to time I had X11 session where maximizing window == placing it on two monitors (which was pain when second one was off or switched to BeagleBoard output). I do not have to add how uncomfortable it was…

So after discussion with few friends I decided to give a chance to ATI and bought Radeon HD5450 card. It is nearly cheapest card on that chipset (I bought DDR3 one instead of cheap DDR2 one) but it feels faster then GeForce 7300GT which I was using before.

But dual head setup is still a problem. Ok, X11 can now start without “/etc/X11/xorg.conf” file (I needed it with NVidia card) but after X session start I need to use XRandR to:

  • switch panels to native resolution (instead of 1680×1050 for both)
  • change orientation (20″ on the right to 24″ instead of cloning)

And then I have few strange things in system:

  • KDE panel does not enlarge with resolution change
  • RSIBreak blackout is only on 1680×1050 area of 24″ panel

So it looks like in near time I will continue fight with creation of proper “xorg.conf” file to get my displays configured properly out-of-box. I wonder when situation will change as it looks now that there is no standardized way to tell which display is which in configuration file (both panels are Samsung, both give “SAM” as name in EDID).

3 thoughts on “Switched to ATI Radeon

  1. rozie

    Well, have similar issues with monitor at work. But I use it only for displaying generic network topology (dual screen is much less usefull if one of monitor is notebook one). I just created script in KDE’s autostart which run xrandr, so after starting system it look like OOTB solution. BTW can you provide exact xrandr commands which you use? Might be useful.

  2. Pingback: 2010 timeline – Marcin Juszkiewicz

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