How to solve the incorrect mtrr table of linux in 4G memory

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This will cause the driver of nvidia not to speed up 2d, and the solution is generally to rewrite the mtrr table.

Echo "disable=2" > | / proc/mtrr

Echo "disable=1" > | / proc/mtrr

Echo "disable=3" > | / proc/mtrr

Echo "disable=4" > | / proc/mtrr

Echo "disable=0" > | / proc/mtrr

Echo "base=0 × 00000000 size=0 × 80000000 type=write-back" > | / proc/mtrr

Echo "base=0 × 80000000 size=0 × 40000000 type=write-back" > | / proc/mtrr

Echo "base=0xC0000000 size=0 × 10000000 type=write-back" > | / proc/mtrr

Echo "base=0 × 100000000 size=0 × 20000000 type=write-back" > | / proc/mtrr

Echo "base=0 × 120000000 size=0 × 10000000 type=write-back" > | / proc/mtrr

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