Oh, and this is the patch that worked for me:
--- nv/nv.c 2009-05-27 03:20:53.000000000 -0700
+++ nv/nv.572433.c 2009-07-05 11:31:27.635210006 -0700
@@ -888,6 +888,7 @@
unsigned int pat1, pat2, i;
U008 PAT_WC_index;
+#if 0 /* disabled */
if (!test_bit(X86_FEATURE_PAT,
(volatile unsigned long *)&boot_cpu_data.x86_capability))
{
@@ -895,6 +896,7 @@
"NVRM: CPU does not support the PAT, falling back to MTRRs.\n");
return NV_PAT_MODE_DISABLED;
}
+#endif
NV_READ_PAT_ENTRIES(pat1, pat2);
PAT_WC_index = 0xf;
--
Compiz broken on Karmic with NVIDIA driver and CPU without PAT support
https://bugs.launchpad.net/bugs/391461
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