Hi Lean, I'm using the same hardware as the original poster Mika (Samsung Q45, Intel GM965 graphics, 4GB ram) and cannot confirm MTTR's beeing setup correctly in 2.6.27-9-server.
I'm using the server kernel image as the generic kernel only detects 3GB of ram, but that's a different issue. With 2.6.27-9 the MTTRs are set up like this: reg00: base=0xc0000000 (3072MB), size=1024MB: uncachable, count=1 reg01: base=0x00000000 ( 0MB), size=4096MB: write-back, count=1 reg02: base=0x100000000 (4096MB), size=1024MB: write-back, count=1 reg03: base=0xbf700000 (3063MB), size= 1MB: uncachable, count=1 reg04: base=0xbf800000 (3064MB), size= 8MB: uncachable, count=1 After applying the changes proposed by the tool mttr-uncover from D. Hugh Redelmeier I get the following layout which allows the X-server to enable write-combining: reg00: base=0x00000000 ( 0MB), size=2048MB: write-back, count=1 reg01: base=0x80000000 (2048MB), size=1024MB: write-back, count=1 reg02: base=0x100000000 (4096MB), size=1024MB: write-back, count=1 reg03: base=0xbf700000 (3063MB), size= 1MB: uncachable, count=1 reg04: base=0xbf800000 (3064MB), size= 8MB: uncachable, count=1 reg05: base=0xd0000000 (3328MB), size= 256MB: write-combining, count=1 Is there anything I can test/help to resolve this issue? -- MTRRs set up incorrectly with 4GB RAM -> X slow https://bugs.launchpad.net/bugs/210780 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
