Configure Display: Orientation: greyed out
James Richard Tyrer
tyrerj at acm.org
Sat May 7 19:56:12 BST 2005
Shaun Jackman wrote:
> On 5/6/05, James Richard Tyrer <tyrerj at acm.org> wrote:
>
>>Shaun Jackman wrote:
>>
>>>All the options of the "Orientation (degrees clockwise)" setting of
>>>the "Configure Display" dialog are greyed out except for "Normal". I
>>>have a landscape/portrait display and would like to set it to "Left
>>>(90 degrees)". Where can I start troubleshooting to find out why these
>>>options are greyed out?
>>
>>If you have an actual landscape/portrait display, this option isn't
>>going to do it. A monitor that allows you to rotate the screen in the
>>stand is not really a landscape/portrait display.
>
>
> OK. I was talking about the latter.
>
>
>>IAC, it is not your display that you configure, it is your video card
>>that needs to be configured. I suspect that the ability to use the
>>simulated portrait display mode (Vertical raster scanning) is dependent
>>on which video card driver you are using. And in the unlikely event
>>that you actually have true portrait display, you would require a video
>>card that would support it.
>
>
> It seems to me that it's only the X server that needs to change where
> it puts its pixels. From the video card's point of view, it's still
> displaying a simple picture of 1600x1200 pixels.
>
>
>>To trouble shoot, you should check to see that you have the Randr
>>extension enabled.
>>
>> xdpyinfo | grep RANDR
>
>
> $ xdpyinfo | grep RANDR
> RANDR
Ok, now run:
xrandr
and see what it says for "Rotations possible".
--
JRT
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