I have a new Lenovo ThinkPad E540. I have successfully installed Ubuntu 12.04 after the installation I receive the 'remove all ... and press any key to restart'. No I receive the selection menu (note that I erased the entire disk and now only Ubuntu is installed!!), but after I clicked on Ubuntu I got black screen with a blinking white underline character in the left top corner.
I read about disabling the UEFI mode in the BIOS, which I did, but I still got the same result.
I reinstalled everything again. After choosing Ubuntu in the GRUB menu the display stays black but I get to the login screen -> noticed by the sound of the drums!! The graphic card is a NVIDIA GeForce GT 740M.
Error before the login screen:
If you hear the login sound, but can't see anything, then it is likely that your backlight didn't turn on (or turned off). Try booting with the following kernel parameters:
To add those parameters: While GRUB is shown press e on the Ubuntu menu entry in grub2, this will take you to edit mode and add the following option to the kernel line (add it to the end of the line which starts with "linux")
Then press CTRL+x to boot with the edited kernel command line.
After you succeed with the boot just edit your
/etc/default/grub
file and add the working kernel line parameter to theGRUB_CMDLINE_LINUX_DEFAULT=
line. After you edited the file runto save the kernel line for later boots.
After looking at the logs I would advise you to try these:
nomodeset
kernel parameter which usually solves problems with the nvidia driver. (But I don't know hownomodeset
behaves with switchable graphics)(II) modesetting(G0): Modeline "1920x1080"x0.0 151.60 1920 2010 2070 2220 1080 1086 1095 1138 -hsync -vsync (68.3 kHz eP)
might mean that there is a problem, I don't know this.), so I still think that this might be only a problem with the backlight not turning on. So you may try increasing the backlight with the backlight combos on your keyboard.After you manage to solve this booting problem, then you can try searching for a solution on how to enable bumblebee or prismus to utilize both of your cards without failures.
Did you install it alongside with Windows?
My recommendation:
Try & report. Thanks!