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Old 12-12-2003, 06:59 PM   #1
alan4482
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Registered: Dec 2003
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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
 
Old 12-12-2003, 07:00 PM   #2
alan4482
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P.S. I've also tried the Vesa driver, which also didn't work.
 
Old 12-19-2003, 03:38 AM   #3
Yeoman
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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?
 
Old 12-27-2003, 02:41 AM   #4
jguido
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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.
 
Old 12-29-2003, 01:47 AM   #5
Yeoman
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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
 
Old 12-29-2003, 08:17 PM   #6
leckie
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Location: Australia
Distribution: Mandrake 9.2
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<<<<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.
 
  


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