I installed Ubuntu 12.4 on 8GB USB Flash drive. It went OK. But when I reboot it goes to Blank screen. IF I press Shift the (GRUB loading) msg on screen. Fan starts so I assume ATI HD6770M graphics card gets control. I've to press and hold power key to close.
BIOS is set to dynamic but changing to fixed doesn't help. Flash drive boots ok on my 32bit desktop. How can I turn ATI card off using Live-USB? ATI card has no problem with WIN7, HP will not help. I've been trying to reinstall ATI drivers, Changing boot options in Grub but nothing helped.
Driver HP dv7-6b00et
At this point, I've tried this:
I selected to stop ATI card. Used a live-USB, Mounted ubuntu.
Installed flashdrive, chrooted, and became root. Edited
/etc/rc.local to add:
echo OFF > /sys/kernel/debug/vgaswitcheroo/switch
/etc/modprobe.d/blacklist-local.conf file was empty so
add blacklist fglrx
REBOOT ===> blank screen
I make /etc/rc.local EXECUTABLE