View Full Version : [lubuntu] Flickering vertical columns

July 13th, 2010, 11:36 AM
After a fresh install of Lubuntu 10.04, my lcd monitor is covered by flickering vertical columns.

lsmod shows I am using the vga16fb module on an intel onboard graphics card.

I am updated to the latest available xserver available by to synaptics. Everything else is also uptated.

I have tried lower refresh rates and resolutions. The only change is in the width of the columns. This monitor works fine in other systems. Its native resolution is 1440 x 900.

What should I do ?

July 14th, 2010, 02:38 AM
Try editing the grub2 menu with some of the intel kernel options listed in my tutorial.
See thread #8 here:

If that doesn't help,post your graphics hardware info from lspci,lshw.Attach to your reply as text /var/log/Xorg.0.log ,or use paste.ubuntu.com and post URL.

July 14th, 2010, 01:49 PM
I tried both intel drivers and xforcevesa, none of them worked.

Here is the info you asked for:


July 14th, 2010, 03:56 PM
You have sis graphics on your systemboard.
Now I need more information.
What kernel modules are autoloaded
Does your system have the sis modules.
What is xorg experiencing/detecting as it attempts to start.

Please open terminal:

Run this command to remap kernel modules.

sudo depmod -a

Combine 1 and 2 on same paste at paste.ubuntu.com and post URL

modprobe -l | grep sis

Make copy of Xorg.0.log

cat /var/log/Xorg.0.log > xorg.txt
Verify xorg.txt contains Xorg.0.log

less xorg.txt

Attach to Reply to Thread

Additional Options/Manage Attachments/Choose file/xorg.txt/upload

July 15th, 2010, 08:22 AM
Here you go:


The X logfile was to large to upload, so I am giving you a this pastbin url instead:


P.S. I do appreciate the help you have given me so far.

July 16th, 2010, 07:48 AM
If your grub menu is hidden start to tap on the shift key when the MB bios shows to make the grub menu appear.
Choose the recover option from the boot menu,
There is a failsafeX choice,I tried and it booted me to a black screen,maybe you'll get lucky.
If not,highlight in the recovery menu root drop to root shell,tab to ok hit enter login with your root password.

Run this command

root@lubuntu:~$ X -configureto probe hardware generate xorg.conf.new

root@lubuntu:~$ nano xorg.conf.new
Section Screen add what's in bold,save.
SubSection "Display"
Viewport 0 0
Depth 24
Modes "1024x768"


root@lubuntu:~$ mv xorg.conf.new xorg.conf

root@lubuntu:~$ mv xorg.conf /etc/X11

root@lubuntu:~$ reboot
If that fails
Add what's in bold,save,reboot.

root@lubuntu:~$ nano /etc/X11/xorg.conf
Section "Monitor"
Identifier "Monitor0"
VendorName "Monitor Vendor"
ModelName "Monitor Model"
HorizSync 28-64
VertRefresh 60

If that fails
Add what's in bold,save,reboot.

root@lubuntu:~$ nano /etc/X11/xorg.conf
Section Device
#Driver "sis"
Driver "vesa"

Paste the xorg.conf if you need more help.