Putting your monitor in portrait mode

I have a wonderful HP LP2475W monitor with a pivoting standard:
http://ii.alatest.com/product/full/5/8/HP-LP2275-LP2475-0.jpg

I wondered if it was easy to use the portrait mode under Linux.

When using proprietary nvidia drivers it is no problem at all:
1. Add the following line to the Device-section for the graphics-card (in /etc/X11/xorg.conf):

Option "RandRRotation" "on"

2. Use these two commands:
xrandr -o 1 Rotate to portrait
xrandr -o 0 Rotate to landscape

3. Add this to rc.xml keybindings to use Openbox keybindings Super + Left (W+ Left) for Portrait and Super + Right back to Landscape Mode

xterm -e "xrandr -o 0"   Screen in Portait Mode
xterm -e "xrandr -o 1"   Screen in Landscape Mode

Thanks to this article: http://symlink.dk/linux/config/pivot/

No Progress Bar at System Startup due to monitor settings

I had a very annoying problem with the startup progress bar that wasn't showing at system boot (Ubuntu).
With the live cd no such problem, so it had to be a configuration error. Installed the startup manager with

sudo apt get install startupmanager

Then I made sure the login screen had a 8 bits 640x480 resolution. Other resolution didn't deliver on my IIyama E1900S.
Edited the xorg.conf file with

Section "Monitor"
Identifier "Configured Monitor"
HorizSync 30-80
VertRefresh 56-75
EndSection

First backup of the file and use a user switch to determine if your new settings work.
These settings are specific for my Iiyama: HorizSync 30-80; VertRefresh 56-75.
Try to determine the configuration of your monitor through documentation or internet.

How to proceed?
Example:
1. Make a backup copy of the current xorg.conf (ALWAYS DO THIS!):

Code:

sudo cp /etc/X11/xorg.conf /etc/X11/xorg.conf.known-to-work

2. Alter xorg.conf in any appropriate way*. (Maybe run "dpkg-reconfigure xserver-xorg" to fix that missing resolution?)
3. Choose System -> Quit -> Switch User

A new X session will start on a second display, and you can now switch between them using the combination Ctrl + Alt + F7 to F12. (Normally, the default X session will be available on Ctrl + Alt + F7, and the second you start will be on Ctrl + Alt + F9)

If you are thrown back into your original session when attempting this - your new xorg.conf probably has an error in it! Check /var/log/Xorg.*.log (usually Xorg.20.log for this second display), and don't forget to restore your backup configuration before rebooting!

Backup Xorg.conf file:

sudo cp /etc/X11/xorg.conf /etc/X11/xorg.conf_backup

Go to folder and file with root privileges for example in Ubuntu:

sudo gedit /etc/X11/xorg.conf

source:
HOWTO: YES! There IS an easy way of trying out Xorg.conf without reloading X
http://ubuntuforums.org/showthread.php?p=4211618


Other resolution/monitor problems:
https://help.ubuntu.com/community/FixVideoResolutionHowto