report: success with agp_try_unsupported=1

From: Peter Jay Salzman (
Date: Mon Sep 24 2001 - 16:40:06 EST

dear all,

i just built a system:

        1.3GHz amd athlon
        epox 8kha ddr motherboard
                via kt266 (vt8366, vt8233)
        768MB ddr ram
        radeon QD with 64MB video buffer, tvio

i enabled agpgart, and got the message:

  Linux agpgart interface v0.99 (c) Jeff Hartmann
  agpgart: Maximum main memory to use for agp memory: 690M
  agpgart: Unsupported Via chipset (device id: 3099), you might want to try
  agpgart: no supported devices found.
  [drm] Initialized radeon 1.1.1 20010405 on minor 0

i rebuilt the kernel with agpgart built as a module. rebooted. loaded the
agp module with:

  insmod /usr/src/linux-2.4.9/drivers/char/agp/agpgart.o agp_try_unsupported=1

loaded the radeon driver with:

  insmod /usr/src/linux-2.4.9/drivers/char/drm/radeon.o

this was successful -- DRI was enabled when i started X (and i played quake3
to reward myself).

i read that success with agp_try_unsupported=1 should be reported here, so
i'm reporting it. please feel free to ask further questions if you want to
know about my hardware.

i do have 2 questions:

1. modprobe didn't seem to know where agpgart.o and radeon.o lives, so i had
   to resort to insmod. is there a way of telling modprobe where to look for

2. i recompiled the kernel but built agpgart in rather than loading it as a
   module. i then inserted the following line into /etc/lilo.conf:


   but it didn't seem to work. someone told me that to get agp work to work
   for my system, agpgart MUST be built as a module and you MUST pass it the
   argument agp_try_unsupported=1. in other words, you can't build it into
   the kernel and pass the argument as a kernel parameter at boot time.

   is that true?

please cc replies to

thanks guys!

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