Just installed Ubuntu 12.04, but when i'm trying to boot desktop in normal mode screen turns black, just black (like turned off), but when I'm trying to boot in secure mode top half of screen start twitch and flick, bottom is black. How can I solve this problem? Netbook Acer Aspire One 751h | Intel GMA500
I've installed a "fresh" Ubuntu 12.04 in my Acer Aspire One 751H, and I've the same problem.
Follow the steps to fix the issue:
Open your Terminal - Ctrl + Alt + F1
sudo service lightdm restart
gksu gedit /etc/default/grub
GRUB_CMDLINE_LINUX_DEFAULT="quiet console=tty1 acpi_backlight=vendor acpi_osi=Linux acer_wmi.blacklist=yes mem=1920mb"
Now it should work.
I had exactly the same issue on an Alienware M18x (2 x ATI cards in there). Using the above answer (thanks to fjt) I booted to recovery mode, enabled networking (which re-mounts the filesystems for you in r/w mode) and dropped to a root prompt.
I edited (using vi)
/boot/grub/grub.cfg and changed the
linux /vmlinux-220.127.116.11-generic to add on the end, "
acpi_backlight=vendor acpi_osi=Linux" (ignore the quotes)
Saved and rebooted. All kicked into life for me. I do have a long standing issue where on shutdown it hangs so I have to force it down, but other than this all is ok.
this works for my Dell Mini!
Using Xubuntu 12.04 on an Acer Aspire One 751h (1 GB RAM) the solution
GRUB_CMDLINE_LINUX_DEFAULT="quiet console=tty1 acpi_backlight=vendor acpi_osi=Linux acer_wmi.blacklist=yes mem=896mb"
Worked fine for me.
Edit GRUB as root using your favourite editor eg. in a terminal
sudo joe /etc/default/grub
GRUB_CMDLINE_LINUX_DEFAULTto the above string
sudo update-gruband reboot.
Contains the solution from Bodhizazen.com