Problem
Trying to get Mandriva 2010 to work on a dual monitor with an ATI Radeon HD 4350. Desktop used is a Dell Vostro 430 and two BenQ G920WL monitors.

Solution
After reading the articles here and here, the steps required were:

• Select driver ATI Radeon HD 2000 and later (radeon/fglrx)
• Don’t select proprietary driver from next screen
• Run xrandr -q to find out the name of the monitors
• From the output find out the current resolution (1440×900), names (VGA_1,DVI-I_2/analog) and maximum resolution (1440×900)
• Edit the xorg.conf file (/etc/X11/xorg.conf) and add the Virtual 2880 900 (without quotes) underneath the Modes line in the Display Subsection
• Save the file and restart the X server
• Run again the xrandr -q command and make sure the maximum resolution has changed to 2880×900
• Run xrandr –output DVI-I_2/analog –auto –right-of VGA_1 to put one screen next to the other
• Follow the description here to set it up permanently on login