Re: Re: Desktop effects not working anymore
One other issue I had was the MTRRs.
On my Dell optiplex 755 there was an overlap of one of the regions.
I had to make a script to change the MTRR regions so I had a "write-combining" area.
What do you have for MTRRs and lspic -v for the video card?
EG:
# cat /proc/mtrr
reg00: base=0x000000000 ( 0MB), size= 2048MB, count=1: write-back
reg01: base=0x07d600000 ( 2006MB), size= 2MB, count=1: uncachable
reg02: base=0x07d800000 ( 2008MB), size= 8MB, count=1: uncachable
reg03: base=0x07e000000 ( 2016MB), size= 32MB, count=1: uncachable
reg04: base=0x07d500000 ( 2005MB), size= 1MB, count=1: uncachable
reg05: base=0x080000000 ( 2048MB), size= 2048MB, count=1: uncachable
reg06: base=0x0d0000000 ( 3328MB), size= 256MB, count=1: write-combining
lspci -v
...
00:02.0 VGA compatible controller: Intel Corporation 82Q35 Express Integrated Graphics Controller (rev 02) (prog-if 00 [VGA controller])
Subsystem: Dell OptiPlex 755
Flags: bus master, fast devsel, latency 0, IRQ 26
Memory at fea00000 (32-bit, non-prefetchable) [size=512K]
I/O ports at ec90 [size=8]
Memory at d0000000 (32-bit, prefetchable) [size=256M]
Memory at feb00000 (32-bit, non-prefetchable) [size=1M]
Expansion ROM at <unassigned> [disabled]
Capabilities: [90] MSI: Enable+ Count=1/1 Maskable- 64bit-
Capabilities: [d0] Power Management version 2
Kernel driver in use: i915
...
The important bits are the "write-combining" region in mtrr and the "prefetchable" line from lspci.
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