# Xrandr and udlfb

- List: linux-fbdev
- 2 messages, 1 author
- Page: https://ratatoskr.run/linux-fbdev/2011/03/13461152/t

## Xrandr and udlfb

- From: Alexander Todorov \<hidden\>
- Date: 2011-03-19 14:18:47 
- Message: https://ratatoskr.run/linux-fbdev/2011/03/13461152.md

```text
Hello folks,
does udlfb support Xrandr? What I need is to be able to rotate the display which 
for some reason I can't. My xorg.conf:

Section "ServerFlags"
         Option "RandR" "on
EndSection

Section "Device"
         Identifier "dl"
         driver     "fbdev"
         Option "ReportDamage" "true"
         Option "fbdev"  "/dev/fb1"
EndSection

Section "Monitor"
         Identifier "monitor"
         Option "Rotate" "left"
         Option "DPMS" "false"
EndSection


I'm using the fbdev DisplayLink Xorg drvier.

When X starts and shows a browser on the screen it is in normal orientation. If 
I decide to use xrandr command I get:

$ xrandr -o left
RANDR failure: 8 (extension base 160)
00060294 000000e2 00000000 00057b2b
00020000 0000003c
X Error of failed request:  BadMatch (invalid parameter attributes)
   Major opcode of failed request:  148 (RANDR)
   Minor opcode of failed request:  2 (RRSetScreenConfig)
   Serial number of failed request:  14
   Current serial number in output stream:  14


Not sure if it is supported or I am missing something.


Regards,
Alexander.
```

## Re: Xrandr and udlfb

- From: Alexander Todorov \<hidden\>
- Date: 2011-03-21 15:27:23 
- Message: https://ratatoskr.run/linux-fbdev/2011/03/13461153.md

```text
На 19.03.2011 16:18, Alexander Todorov написа:
> Hello folks,
> does udlfb support Xrandr? What I need is to be able to rotate the display which
> for some reason I can't.
>

Hello,
I've found this post about udlfb rotation:
http://plugable.com/2010/01/02/displaylink-linux-rotation/


As it seems there are some drawbacks.

Can anyone give information about current status of rotation support for udlfb 
and which is the preferred way to implement it?

Thanks,
Alexander.
```