Hi,
Yesterday I installed Fedora Code 4 on my Laptop (IBM ThinkPad R52
(1860AQ1)) which has inbuilt Intel 915GM Graphics Accelarator with 128MB
shared video memory.
In the begining X was not working properly. It showed only corrupted
display. My LCD monitor supports 1400x1050 maximum resolution in Windows
OS. The driver used by Linux is generic VESA.
Actually I googled a lot regarding 915G chipset before starting the
installation. But I couldn't find much help. In reading about this I also
found this: http://www.geocities.com/stomljen/ which contains ;
915resolution (from 855resolution) which is supposed to add a VESA mode
for 1400x1050. I haven't attempted to use that, but some people have
reported success. Rather you can say that I am afraid to run that program.
You can see that the program modifies the some information @VBIOS.
I thought of changing X configuration. So I backed up my
/etc/X11/xorg.conf and modified it. After lots of trial and error the
following configuration helped me to bring X up.
1) commenting the following entries in "Monitor" section.
HorizSync 15.0 - 35.0
VertRefresh 50.0 - 75.0
I did this becuase the log says that refresh rate is not matching for
the mode 1280x1020 while probing this mode. It was not even trying to
probe 1400x1050.
2) In "Screen" section
I changed the existing lines to look like this.
DefaultDepth 24
Subsection "Display"
Depth 24
Modes "1400x1050"
ViewPort 0 0
EndSubsection
Now when I started X it worked. Well I am confused how it worked, because
I commented out the HorizSync and VertRefresh entries, I think which are
very much important. I wonder how it used 1400x1050 resolution which is
not even probed by X while trying to choose the apt mode.
In GNOME, it says that the resolution is 1400x1050 and the refresh rate as
0Hz. Is this something dangeros? Well the X works fine. Windows says that
refresh rate is 60Hz. Does anyone come across something like this? This
0Hz is really bothering me to continue using X.
Cheers,
Noorul
