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Subjectthinkpad x200 X.server not work with gm4500 graphics
deal,

My thinkpad x200's X.server can not startup on the kernel 2.6.28,
and dmesg will show as below:
-->>--
[drm] Initialized drm 1.1.0 20060810
pci 0000:00:02.0: power state changed by ACPI to D0
pci 0000:00:02.0: PCI INT A -> GSI 16 (level, low) -> IRQ 16
pci 0000:00:02.0: setting latency timer to 64
[drm] Initialized i915 1.6.0 20060119 on minor 0
pci 0000:00:02.0: pg_start == 0x00001f7f, intel_private.gtt_entries == 0x00001fff
pci 0000:00:02.0: trying to insert into local/stolen memory
--<<--

Then, I change file "drivers/char/agp/intel-agp.c" as this:
-->>--
--diff --git a/drivers/char/agp/intel-agp.c b/drivers/char/agp/intel-agp.c
index 9cf6e9b..e681f75 100644
--- a/drivers/char/agp/intel-agp.c
+++ b/drivers/char/agp/intel-agp.c
@@ -528,7 +528,8 @@ static void intel_i830_init_gtt_entries(void)
* stolen, ignore it in stolen gtt entries counting. However,
* 4KB of the stolen memory doesn't get mapped to the GTT.
*/
- size = 4;
+ /* size = 4; */
+ size = 516;
} else {
/* On previous hardware, the GTT size was just what was
* required to map the aperture.
--<<--
And Xorg can start now.
(1) Is it correct ?
Because older kernel use size as "512 + 4" at here, but now use "size = 4".
(2) How to deal with it if the patch is not right ?
(3) How to get more specification about gm4500 ?


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