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With X86_PAT enabled, when X is started I get about 40 lines (with varying addresses) like: kernel: Xorg:3358 /dev/mem expected mapping type write-back for 807bf000-81000000, got uncached-minus And when X exits I get a bunch of lines like: kernel: Xorg:3349 freeing invalid memtype 80020000-8002a000 I also noticed artifacts (a band of about 2 cm high across the screen) after X goes to black but before the switch to VT1. When I unset X86_PAT all this disappeared. Apparently this has been seen before: http://lkml.org/lkml/2008/5/2/139 The author of that mail also points to: http://marc.info/?l=linux-kernel&m=120612742217604&w=2 Is this a bug in PAT or not. If it is, should PAT really be recommended to be enabled by default? System: Intel desktop with D945GCZ mainboard Intel(R) Pentium(R) D CPU 3.20GHz x86_64 kernel; Debian unstable Video: 00:02.0 VGA compatible controller [0300]: Intel Corporation 82945G/GZ Integrated Graphics Controller [8086:2772] (rev 02) Cheers, FJP | |||||||||
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