Re: AGPGART problems with VIA KX133 chipsets under 2.2.18/2.4.0

[Jeff Hartmann]

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Michael Guntsche wrote:

> Hello all,
> 
> While playing around with the agpgart module I noticed the following strange
> behaviour.
> 
> The hardware in question is an Asus K7V with the KX133 chipset and has been
> tested on both 2.4.0 and 2.2.18 kernels.
> 
> The output below is just from insmod,rmmod,insmod agpgart without starting
> X.
> 
> insmod agpgart for the first time:
> Jan 22 23:17:10 deepblue kernel: Linux agpgart interface v0.99 (c) Jeff
> Hartmann
> Jan 22 23:17:10 deepblue kernel: agpgart: Maximum main memory to use for agp
> memory: 204M
> Jan 22 23:17:10 deepblue kernel: agpgart: Detected Via Apollo Pro chipset
> Jan 22 23:17:10 deepblue kernel: agpgart: AGP aperture is 64M @ 0xe4000000
>                                                                   ^-------
> 
> rmmod, insmod agpgart:
> Jan 22 23:17:16 deepblue kernel: Linux agpgart interface v0.99 (c) Jeff
> Hartmann
> Jan 22 23:17:16 deepblue kernel: agpgart: Maximum main memory to use for agp
> memory: 204M
> Jan 22 23:17:16 deepblue kernel: agpgart: Detected Via Apollo Pro chipset
> Jan 22 23:17:16 deepblue kernel: agpgart: AGP aperture is 64M @ 0x4000000
>                                                                   ^------
> Apparently AGP isnt working afterwards.
> Someone know what might be causing this?
> 
> 
> If you need more information or a want me to help debug this issue further
> dont hestitate to tell me.
> 
> Since Im not subscribed to the list, please CC any replies to me directly.
> 
> 
> 
> 
> Cheers,
> Mike
> 
> 
> -
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Can you try this patch and tell me if it fixes the problem (against 2.4.0)?

Apply the patch when in the directory drivers/char/agp.

-Jeff

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--- agpgart_be.c~	Fri Dec 29 15:07:21 2000
+++ agpgart_be.c	Tue Jan 23 09:45:49 2001
@@ -1384,7 +1384,9 @@
 	aper_size_info_8 *previous_size;
 
 	previous_size = A_SIZE_8(agp_bridge.previous_size);
+#if 0
 	pci_write_config_dword(agp_bridge.dev, VIA_ATTBASE, 0);
+#endif
 	pci_write_config_byte(agp_bridge.dev, VIA_APSIZE,
 			      previous_size->size_value);
 }

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