[Bug 71267] sna: (Haswell) X-server freezes when enabling DP at docking station

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=71267

--- Comment #71 from Stefan Agner <stefan at agner.ch> ---
I tried the patch agains 3.13-rc4 which should fix DP. However, on my device I
can't boot Linux at all using this patch (undocked!). I patched a mainline
3.13-rc7 on my Arch Linux. Without the patch, it boots fine, but with the patch
the kernel boot freezes just before the switch to the Intel FB. 

Note: Before I even run the patched kernel the first time, I upgraded to latest
BIOS (2.17) and also made the Firmware upgrade of the internal DP to VGA
converter (see
http://support.lenovo.com/en_US/downloads/detail.page?DocID=DS038203).
Especially the second one in combination with the patch might trigger my
freeze...

Do you did this firmware upgrade?

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