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On Thu, Feb 4, 2010 at 9:17 AM, Grant <emailgrant@×××××.com> wrote: |
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>>> I've only ever used my laptop's VGA-out into 4:3 screens and it always |
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>>> works great. I've now plugged it into a 16:9 screen for the first |
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>>> time, and it still displays 4:3 on that screen and on my laptop. Is |
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>>> there a way for it to detect the proper aspect ratio? Maybe it |
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>>> depends on the monitor's EDID? If not, can I manually change the |
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>>> aspect ratio? |
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>>> |
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>>> - Grant |
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>> |
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>> Not sure about how well it will work automatically, but try running |
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>> |
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>> xrandr |
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>> |
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>> and reading the output. It should tell you what monitors you have |
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>> hooked up and what resolutions and scan frequencies they support. I |
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>> did this and then put the ones I wanted into my xorg.conf file and was |
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>> good to go. |
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>> |
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>> Hope this helps, |
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>> Mark |
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> |
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> Thanks Mark. Is there a slick way to restart xorg without rebooting |
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> so you can switch between VGA-out mode and non? When I'm doing |
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> VGA-out, my laptop's screen changes to match the aspect ratio of the |
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> output so it's good to be able to switch. |
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> |
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> - Grant |
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Not sure of the best way to do that, but is it really necessary? |
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I suppose you could try (from the console) |
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/etc/init.d/xdm restart |
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and see if it does what you want. |
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Note that you can set up your screens using xrandr itself. I'm not |
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very good at it but I've played with it and it works. Duncan on the |
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amd64 list posted a couple of commands he uses. They look like this: |
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xrandr --verbose --fb 1920x2400 --output DVI-0 --mode 1280x800 --panning |
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1920x1200+0+0/1920x1200+0+0/20/20/20/20 --output DVI-1 --mode 1280x800 -- |
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panning 1920x1200+0+1200/1920x1200+0+1200/20/20/20/20 |
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Clearly that's a mouthful but I'm sure it makes sense once you get |
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down to the basics. I think you can break it apart into something |
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like: |
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xrandr --verbose --fb 1920x2400 |
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--output DVI-0 --mode 1280x800 --panning |
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1920x1200+0+0/1920x1200+0+0/20/20/20/20 |
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--output DVI-1 --mode 1280x800 --panning |
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1920x1200+0+1200/1920x1200+0+1200/20/20/20/20 |
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where DVI-0 and DVI-1 are the monitors and everything else is info to |
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xrandr is what to do. You would change the output names to whatever |
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yours are called. The first line 1920x2400 sets up (I think) the |
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overall screen size and then the next two lines set up the two |
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monitors. I think in his case they sit vertically, not horizontally |
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like mine and possibly yours do. |
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In my case I run 1280x1024 on the left monitor and 1680x1050 on the |
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right monitor. I can drag stuff left and right just fine. It gets |
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messed up if I play a game though. |
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Anyway, there's some stuff for you to look at and consider. |
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Cheers, |
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Mark |
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