[Bug 84744] ZaphodHeads need O_NONBLOCK suppor

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=84744

--- Comment #18 from M. G. <gentoo at gishpuppy.com> ---
Wow, many thanks for the fast fix! Now everything works as desired. Great!

I noticed that your drm:nonblock patch is already over one year old. How about
the chances that the patch will become part of the mainline kernel?

And one last question: Is the TearFree option unsupported with ZaphodHeads? I
get a segfault if I have it in my xorg.conf (no difference whether it is in
both Device sections or just in one):

(EE) Backtrace:
(EE) 0: /usr/bin/X (xorg_backtrace+0x42) [0x58f872]
(EE) 1: /usr/bin/X (0x400000+0x193519) [0x593519]
(EE) 2: /lib64/libpthread.so.0 (0x7f13603f1000+0x11250) [0x7f1360402250]
(EE) 3: /usr/lib64/xorg/modules/drivers/intel_drv.so (0x7f135c54f000+0x6f5bb)
[0x7f135c5be5bb]
(EE) 4: /usr/lib64/xorg/modules/drivers/intel_drv.so (0x7f135c54f000+0x6f4ee)
[0x7f135c5be4ee]
(EE) 5: /usr/bin/X (WakeupHandler+0x9c) [0x43f79c]
(EE) 6: /usr/bin/X (WaitForSomething+0x1a4) [0x58d094]
(EE) 7: /usr/bin/X (0x400000+0x3ab81) [0x43ab81]
(EE) 8: /usr/bin/X (0x400000+0x3ebea) [0x43ebea]
(EE) 9: /lib64/libc.so.6 (__libc_start_main+0xf5) [0x7f135f076db5]
(EE) 10: /usr/bin/X (0x400000+0x29641) [0x429641]
(EE) 
(EE) Segmentation fault at address 0x7fff2953f050

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