Blank screen: 10.04, ATI Radeon 9550

[sumindless]

Hey guys, just thought I'd throw in some extra information. I too am having the same problem, as soon as X tries to load my screen just goes blank. I have an ATI Radeon 9550. At first I tried switching between VGA and DVI as well but upon ruling that out, I switch to my on-board video card and that is working thus far, but I'm trying very hard to figure out a way to be able to switch back. Anyways I'll check back in later on if I have any new information I will post, and thanks in advance to anyone else who does the same.

Mindless

[Iowan]

Moved to new thread.
Original (http://ubuntuforums.org/showthread.php?t=1477923)

[Catharsis]

Did you try booting with "nomodeset"?
1) Hold down Shift while booting to get the grub menu.
2) Press 'e'. Type "nomodeset" after "quiet splash".
3) Ctrl+x to boot.

[Red3]

I have a 9550 as well, and after installing 10.04 encountered similar problems when using the radeon driver. The following settings worked well for me:

/etc/X11/xorg.conf


Section "Device"
Identifier "Radeon 9550"
Driver "ati"
BusID "PCI:1:0:0"
Option "XAANoOffscreenPixmaps"
Option "EnablePageFlip"
Option "TripleBuffer" "true"
EndSection

Section "Monitor"
Identifier "LG"
EndSection

Section "Screen"
Identifier "Default Screen"
Device "Radeon 9550"
Monitor "LG"
EndSection/etc/modprobe.d/radeon.conf


options radeon modeset=0