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Laptop hang when calling nv50_crtc_disable
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Clearing the 8 LSB of 8841c get it to work (this was done by the PCI-reset, hence why it *worked*).
Going to find out which PPCI configuration is missing. Hopefully this shoud also solve T17 and T18.

Fixed per this patch: https://bugs.freedesktop.org/show_bug.cgi?id=86537#c10 (and some later version of it)