Re: i845 on RedHat 8.0

From: J.O. Aho (user_at_example.net)
Date: 02/22/05 

Date: Tue, 22 Feb 2005 10:29:19 +0100

Dennis Peere wrote:
> Dear All,
>
> I'm having problems getting an onboard i845 VGA to work @ 1024 x 768 in
> RedHat 8.0 => It only wants to work @ 800 x 600
> Upgrading to e newer version of RedHat/Fedora is not an option for me :-(
> Hope someone will be able to help me out here

Oh gosh, you know redhat 8 is unsupported, not even fedoralegacy.org does
support it and if you do not yourself see to upgrade pacakges, you will have a
quite unsecure computer. You should at least upgrade to RH9, which is a lot
more stable than the unstable RH8 (sadly not as stables as RH7.3 and of course
not as good, both 7.3 and 9 is supported by fedoralegacy.org).

> This is the error I get in /var/log/XFree86.0.log
> (II) I810(0): Monitor0: Using hsync range of 30.00-61.00 kHz
> (II) I810(0): Monitor0: Using vrefresh range of 56.00-76.00 Hz
> (II) I810(0): Not using mode "1024x768" (no mode of this name)
> (II) I810(0): Increasing the scanline pitch to allow tiling mode (800 ->
> 1024).
> (--) I810(0): Virtual size is 800x600 (pitch 1024)
> (**) I810(0): Built-in mode "800x600"
> (**) I810(0): Built-in mode "640x480"
> (--) I810(0): Display dimensions: (300, 230) mm
> (--) I810(0): DPI set to (67, 66)

 From the XFree86 4.2 online driver manual:

Description
i810 is an XFree86 driver for the Intel i810 family of graphics chipsets. The
driver supports depths 8, 15, 16 and 24. All visual types are supported in
depth 8, other depths only support TrueColor. The driver supports hardware
accelerated 3D via the Direct Rendering Infrastructure (DRI), but only in
depth 16.
Supported Hardware
i810 supports the i810, i810-DC100, i810e and i815 chipsets.

Configuration Details
Please refer to XF86Config(5) for general configuration details. This section
only covers configuration details specific to this driver.

The i810 has a unified memory architecture and uses system memory for video
ram. By default 8 Megabytes of system memory are used for graphics. This
amount may be changed with the VideoRam entry in the config file Device
section. It may be set to any power of two between 4 and 32 Megabytes
inclusive to allow the user to customize the balance between main memory usage
and graphics performance. Too little memory reserved for graphics can result
in decreased 3D and 2D graphics performance and features.

The following driver Options are supported

Option "NoAccel" "boolean"
     Disable or enable acceleration. Default: acceleration is enabled.
Option "SWCursor" "boolean"
     Disable or enable software cursor. Default: software cursor is disable
and a hardware cursor is used.
Option "ColorKey" "integer"
     This sets the default pixel value for the YUV video overlay key. Default:
undefined.
Option "CacheLines" "integer"
     This allows the user to change the amount of graphics memory used for 2D
acceleration and video. Decreasing this amount leaves more for 3D textures.
Increasing it can improve 2D performance at the expense of 3D performance.
Default: 256 to 768 depending on the resolution and depth.

You should get your X upgraded to xorg 6.8.2 if you want to have a chance to
get things to work better, the i810 driver is quite basic in XFree86 pre 4.4
(most distros has changed over to xorg, due the the new license for xfree86
and that xfree86.org hasn't declared about their future).

  //Aho

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