Created attachment 122581 [details] /var/log/Xorg.0.log and xrandr output When i switched from fglrx-updates to xorg my second display stayed black the whole bootup (after bios) and didn't get recognized lateron either. Then, i added xorg-edgers ppa (& update & distupgrade & restart) because it improved the performance of a game, but the second screen stayed black. Ubuntu's 14.04 system settings don't show the second display either. I've attached the output of cat /var/log/Xorg.0.log and xrandr --verbose output. Strangly, xrandr doesn't list my graphics card's interfaces, eh? Primary mon is connected via DVI, secondary via VGA. (Benq BL2405 and FP93G-X on a ATI Radeon HD7730)
As you can see in the Xorg log, you're not using the radeon driver but the generic fbdev driver. Make sure the radeon kernel driver isn't still blacklisted from when fglrx was installed. If that's not the problem, please attach the corresponding dmesg output.
thanks for the hint! i discovered that i had to purge all fglrx stuff (since dmesg showed it was still being used), and also had to remove --nomodeset from my grub config (required by fglrx but made radeon driver not use hw accel and not detect 2nd monitor) by looking at dmesg and picking up an error. also, i am very disappointed at canonical for not making their "additional drivers" app actually do what it should (http://ubuntuforums.org/showthread.php?t=2189881);) (however, there was no blacklist for the radeon driver in place, only for some amd related chip controller or something: amd76x_edac)
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