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pauloz
July 8th, 2012, 06:39 AM
Greetings!

I recently installed Ubuntu 12.04 on an Acer Aspire 3500 and after experiencing problems with the wireless connection (now resolved thanks to chili555 and wildmanne39), I find the screen remains blank after I either start up or reboot the laptop.

I find the problem is resolved after pressing CTRL ALT F1 and then CTRL ALT F7. Obviously I don't want to keep doing this, so can anybody help?

Thanks!

AlbertJB
July 8th, 2012, 06:50 AM
Just found this: http://askubuntu.com/questions/10384/blank-screen-after-switch-user-or-resume

It seems it's an old problem maybe related to xgamma... Anyone else?

NikTh
July 8th, 2012, 07:12 AM
When you hit Ctrl+alt+F1 , login with username & password . Then give these commands

sudo service lightdm stop
sudo apt-get install -f
sudo dpkg --configure -a
sudo dpkg-reconfigure lightdm xserver-xorg xserver-xorg-core xsever-common xorg
sudo service lightdm start
Write down these commands to no mistake .
Reboot to check the result..

pauloz
July 8th, 2012, 07:56 AM
Hello

Unfortunately no change - any other suggestions? Thanks

NikTh
July 8th, 2012, 05:09 PM
hmmm , strange problem. Try to reinstall
sudo apt-get install --reinstall lightdmAlso check out your graphics driver.. what it is ? open source or additional ? If you have additional driver enabled , do you want to procedure with an UN-installation (disable) ?

There is also something else.. try

sudo update-grub
sudo update-initramfs -u -k all

pauloz
July 9th, 2012, 11:26 AM
Hello again NikTh

Here's the output of the commands you asked me to check:


graham@graham-Aspire-3500:~$ sudo apt-get install --reinstall lightdm
[sudo] password for graham:
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following packages were automatically installed and are no longer required:
compiz-plugins compiz-plugins-main python-compizconfig python-central
Use 'apt-get autoremove' to remove them.
0 upgraded, 0 newly installed, 1 reinstalled, 0 to remove and 0 not upgraded.
Need to get 96.3 kB of archives.
After this operation, 0 B of additional disk space will be used.
Get:1 http://au.archive.ubuntu.com/ubuntu/ precise/main lightdm i386 1.2.1-0ubuntu1 [96.3 kB]
Fetched 96.3 kB in 1s (89.7 kB/s)
Preconfiguring packages ...
(Reading database ... 200507 files and directories currently installed.)
Preparing to replace lightdm 1.2.1-0ubuntu1 (using .../lightdm_1.2.1-0ubuntu1_i386.deb) ...
Unpacking replacement lightdm ...
Processing triggers for ureadahead ...
ureadahead will be reprofiled on next reboot
Processing triggers for man-db ...
Setting up lightdm (1.2.1-0ubuntu1) ...
graham@graham-Aspire-3500:~$
graham@graham-Aspire-3500:~$
graham@graham-Aspire-3500:~$ sudo update-grub
Generating grub.cfg ...
Found linux image: /boot/vmlinuz-3.2.0-26-generic-pae
Found initrd image: /boot/initrd.img-3.2.0-26-generic-pae
Found linux image: /boot/vmlinuz-3.2.0-25-generic-pae
Found initrd image: /boot/initrd.img-3.2.0-25-generic-pae
Found linux image: /boot/vmlinuz-3.2.0-23-generic-pae
Found initrd image: /boot/initrd.img-3.2.0-23-generic-pae
Found memtest86+ image: /boot/memtest86+.bin
done
graham@graham-Aspire-3500:~$
graham@graham-Aspire-3500:~$
graham@graham-Aspire-3500:~$ sudo update-initramfs -u -k all
update-initramfs: Generating /boot/initrd.img-3.2.0-26-generic-pae
update-initramfs: Generating /boot/initrd.img-3.2.0-25-generic-pae
update-initramfs: Generating /boot/initrd.img-3.2.0-23-generic-pae
graham@graham-Aspire-3500:~$

Can you show me how to check the graphics driver and what I should do next? This time the screen came on when I started up but again went blank after about 10 minutes and the only way I could turn it on was to type CTRL ALT F1 then CTRL ALT F7.

Thanks

NikTh
July 9th, 2012, 06:26 PM
Can you show me how to check the graphics driver and what I should do next? This time the screen came on when I started up but again went blank after about 10 minutes and the only way I could turn it on was to type CTRL ALT F1 then CTRL ALT F7.

You can give this command and see what driver you use.. for graphics ..

lspci -nnk | grep -iA2 vga

Depends on graphics driver , you can install or uninstall an see how goes.
Also you have packages that no longer required so run this command to get rid of them (they are useless)

sudo apt-get autoremove

PhilTroy
July 10th, 2012, 06:01 AM
Hi!

When installing Lubuntu 12.04 with Cedarview drivers (for Atom N2800 on DN2800MT motherboard), I had a similar problem. Please see my several entries on blog at http://daily.siebler.eu/2012/06/ubuntu-12-04-driver-for-intel-cedarview-atom-n2000-und-d2000-serie/

The upshot is that I removed lightdm and installed gdm and Lubuntu booted right away, with the desired drivers. I think that lightdm has some dependencies or bugs that need to taken care of.

Phil Troy

pauloz
July 10th, 2012, 10:17 AM
You can give this command and see what driver you use.. for graphics ..

lspci -nnk | grep -iA2 vga

Depends on graphics driver , you can install or uninstall an see how goes.
Also you have packages that no longer required so run this command to get rid of them (they are useless)

sudo apt-get autoremove

Hello NikTh - here is the output of what you mentioned:


graham@graham-Aspire-3500:~$ lspci -nnk | grep -iA2 vga
01:00.0 VGA compatible controller [0300]: Silicon Integrated Systems [SiS] 661/741/760 PCI/AGP or 662/761Gx PCIE VGA Display Adapter [1039:6330]
Subsystem: Acer Incorporated [ALI] Device [1025:0082]
Kernel modules: sisfb
graham@graham-Aspire-3500:~$ sudo apt-get autoremove
[sudo] password for graham:
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following packages will be REMOVED:
compiz-plugins compiz-plugins-main python-central python-compizconfig
0 upgraded, 0 newly installed, 4 to remove and 2 not upgraded.
After this operation, 5,959 kB disk space will be freed.
Do you want to continue [Y/n]? Y
(Reading database ... 200506 files and directories currently installed.)
Removing compiz-plugins ...
Removing compiz-plugins-main ...
Removing python-central ...
Removing python-compizconfig ...
Processing triggers for gconf2 ...
Processing triggers for man-db ...
graham@graham-Aspire-3500:~$

@ Phil - sorry I made a mistake when I selected the options. I'm running Ubuntu 12.04 not Lubuntu 12.04. Thanks anyway for your post.

Cheers
pauloz

NikTh
July 11th, 2012, 12:33 AM
graham@graham-Aspire-3500:~$ lspci -nnk | grep -iA2 vga
01:00.0 VGA compatible controller [0300]: Silicon Integrated Systems [SiS] 661/741/760 PCI/AGP or 662/761Gx PCIE VGA Display Adapter [1039:6330]
Subsystem: Acer Incorporated [ALI] Device [1025:0082]
Kernel modules: sisfb

Hmmm... you have SIS. Sorry i cannot help you with SIS. I don't know those cards , but i know that have strange behaviour with Linux.

pauloz
July 11th, 2012, 09:58 AM
Hmmm... you have SIS. Sorry i cannot help you with SIS. I don't know those cards , but i know that have strange behaviour with Linux.

OK - thanks NikTh for your help. Can anybody else offer assistance?

chenhs05
November 17th, 2012, 01:22 PM
When you hit Ctrl+alt+F1 , login with username & password . Then give these commands

sudo service lightdm stop
sudo apt-get install -f
sudo dpkg --configure -a
sudo dpkg-reconfigure lightdm xserver-xorg xserver-xorg-core xsever-common xorg
sudo service lightdm start
Write down these commands to no mistake .
Reboot to check the result..
Thank you NikTh!
It works for me.
I was able to login before I changed in the /etc/X11/default-display-manager file from "/usr/sbin/lightdm" to "/usr/sbin/gdm".
Even though I changed back, it consistently gives me a black screen when I boot the system. I have to use "sudo service lightdm start" to go to the gui.
For me it's mainly because of the configuration...