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Yesterday I updated my ubuntu 13.04 to 13.10. After the restart I saw the purple screen and then it was black again, switching to the login screen as usually. But the screen keeps black. I can hear the drum roll for the ready login screen but I can't see anything. I also doesn't have access to the console.

Ok so I googled for this kind of problem and found this article: Black screen after upgrading from 13.04 to 13.10

It seems to be a kernel bug, see here: https://bbs.archlinux.org/viewtopic.php?id=167463

And as a quick solution this was mentioned:

Quick solution is to switch to BIOS mode instead of UEFI mode.
= Disable Secure Boot and enable "Launch CSM".

I went to my BIOS right after a restart and looked for UEFI to disable it. It was already disabled... Then I had a look for "Launch CSM" but couldn't find it. Can someone please help me? I'm not a pro with BIOS and so on. I also made no backup because it wouldn't be a problem to re-install ubuntu completely. But this shall only happen in worst case.

I'd be thankful for any kind of suggestions.

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@AvinashRaj If I select "UEFI Mode" I can only choose between disbale and enable. –  Max Boll Jan 8 at 9:02
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2 Answers 2

Try brighten up the display with Fn+F5. It seems that the backlight is set to 0 during boot. ............................................................................. or try this

Have you tried the following?

Open Terminal (Press Ctrl+Alt+T) and type:

sudo gedit /etc/rc.local Add this before the last line "exit 0":

echo 4 > /sys/class/backlight/acpi_video0/brightness

......................................................................................... or if its about ur graphic cards

Actually it is about video drivers. Catalyst version 13.4 supports xorg only up to 1.13.

As of April 26, 2013, Catalyst packages are no longer offered in the official repositories. In the past, Catalyst has been dropped from official Arch support because of dissatisfaction with the quality and speed of development. This time, it's the incompatibility with Xorg 1.14.

look at: https://wiki.archlinux.org/index.php/AMD_Catalyst

hope that will help you m8

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Fn + F5 isn't working. I have a ATI Mobility Radeon HD 5470 –  Max Boll Jan 8 at 17:06
    
ok may be this shuld help askubuntu.com/questions/87409/… –  ahmed ali Jan 8 at 18:34
    
please backup ur bootloader before above comment help.ubuntu.com/community/Boot-Repair –  ahmed ali Jan 8 at 18:42
    
    
Well I still can access the grub menu when I start via USB Stick (Ubuntu 13.04). Thanks for the help but yesterday I saw this error "Kernel Panic: Not syncing: VFS unable to mount root fs...". Looks like my notebook is done. –  Max Boll Jan 9 at 9:02
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1.Start ubuntu, login, now in the blackscreen go to the console ctrl-alt-f1 and type nautilus

2.if nautilus cannot be opened in terminal type unity

3..now without exiting or stoping the unity comand return to the ubuntu interface in my pc is ctrl-alt-f7

4.open terminal in nautilus using ctrl-alt-t and type nautilus while nautilus still open, in terminal type sudo software-properties-gtk

5.search for graphic drivers, my problem was the default drivers of X.org. I have an ati video card and I installed the drivers of fglrx-updates if you have nvidia install the drivers of nvidia or if you have ati driver

6.reboot

7.after login u will see nautilus running well and the wallpaper the only thing not working is unity. open terminal and type: dconf reset -f /org/compiz/ and setsid unity thats it.

I hope this fix

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