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Issues with kernel 2.6.28 and fglrx 8.561

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  • Issues with kernel 2.6.28 and fglrx 8.561

    After I upgraded my kernel to 2.6.28, I got some error messages in dmesg when I enter X:
    [fglrx:firegl_addmap] *ERROR* mtrr allocation failed (-22)
    I have MTRR and PAT options turned on in kernel configuration. But fglrx 8.561 turns off PAT support by default.

    The X runs well and so do 3D games except the following problems:

    1. When I exit X and try to re-enter X, the whole system locks up. Only SYSRQ reboot command can get me out of this condition. Unload fglrx module before I re-enter X solves the problem. But I don't think this is a proper solution.

    2. Quake4 runs. But there exist visual problems in some dark rooms with lights on and off. Upper half of the room is total darkness and lower half are normal textures that flicker a lot.

    Is anyone having problem with kernel 2.6.28?

    Is it possible that the new feature (GEM) of kernel 2.6.28 cause the problem?

    Intel Q6000 @ 2.4GHz
    PowerColor HD 4870x2
    DDR2-800 2GB x 2

    Gentoo Linux with kernel 2.6.28
    fglrx 8.561
    gcc 4.3.2