Resolution not right with Intel 845GL graphics
 

Hi,
I am running Fedora Core 1 with the 2.4.22-1.2129.nptl kernel on my Dell Inspiron 1100 laptop. The built in graphics is the Intel 845GL. X fails to start if I set the default depth in the XF86Config file to 24 bit. If I set it to 16 the resolution displayed is 640x480. If I set the default depth to 8 then the resolution is 1024x768. I know for a fact that the monitor and graphics support 1024x768 at 32 bit. In my bios it says there is 1MB of video memory. What do I have to do to get my graphics at 1024x768 at 24 bit? Thanks in advance. Here is part of my XF86Config file:

Section "Monitor"
Identifier "Monitor()"
VendorName "Monitor Vendor"
ModelName "Dell 1024x768 Laptop Display Panel"
HorizSync 31.5 - 48.5
VertRefresh 59.0 - 75.0
Option "dpms"
EndSection

Section "Device"
Identifier "Videocard()"
Driver "i810"
VendorName "Videocard vendor"
BoardName "Intel 845"
VideoRam 16834 #I added this in an attempt to fix it but the result is the same
EndSection

Section "Screen"
Identifier "Screen()"
Device "Videocard()"
Monitor "Monitor()"
DefaultDepth 8
SubSection "Display"
Depth 24
Modes "1024x768" "800x600" "640x480"
EndSubSection
SubSection "Display"
Depth 16
Modes "1024x768" "800x600" "640x480"
EndSubSection
SubSection "Display"
Depth 8
Modes "1024x768" "800x600" "640x480"
EndSubSection
EndSection

Section "DRI"
Group 0
Mode 0666
EndSection

P.S. I've also tried the Vesa driver, which also didn't work.

I installed Suse 9.0 (and 8.1 too), and have exactly same problem on my IBM NetVista 8307-41G with 845 chipest (Intel Pentium 4 2.4GHz (512KB), 256MB, PCI Microtower (4x5), Intel Extreme Graphics). Works only on 640x480 @ 16 bits, and there is no way to get 800 or 1024 @ 16 or 24 bit. I'm using IBM LCD ThinkVision L150.

So maybe someone get any solution?

Any solution yet? I'm also having this problem. I have a Dell Dimension 2350 with that chipset. I've tried absolutely everything and can't get it out of 640x480. However, in Knoppix, it works fine at that resolution.

In another tread in this forum i found solution. Just install 845 patch (not oficial), and it change your video memory from 1 MB to 10 MB.

One of tread is there, but there is another one, just can't find. Try to search.

http://www.linuxquestions.org/questi...light=845patch

<<<<COPY PAST>>>>>>>>>>>.
Dell use Intel's North Bridge the 82845G with integrated graphics and share system memory.

The 82845 has a faster draw rate then the 82830G and the i810. But there are a few changes in the chip for example no over plane.

The main difference to users is they changed the memory allocation.

So as ac_dispatcher nicely provided the link u will have to run a patch called the 845patch.
This will allocate memory to the graphics and enable full screen. here is the link http://geocities.com/randomnumberge...845patch.tar.gz

BUT!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Xfree86 driver i810 is very pore performer and is probably at worst with the 845G.

If U can afford $69 US go here www.xig.com
They have a driver for the intel series with almost a 10 fold performance increase.
I went from about 1 frame every few seconds to full game speed with Quake 3.
Xig benchmarked it from 80,000 char/sec to 600,000.
Also supports dual head.