[Bug 95176] LCD flickering on Thinkpad T440p (Haswell) with kernel 4.6-rc4 (PSR enabled)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=95176

--- Comment #50 from raoul <ein4rth at gmail.com> ---
On my i7-4510U with kernels 4.6 and 4.7 system always hangs after boot (as soon
as gdm appears), and only i915.enable_psr=0 solves the problem. Kernel 4.5
worked flawlessly. This is my lscpi output:

00:02.0 VGA compatible controller: Intel Corporation Haswell-ULT Integrated
Graphics Controller (rev 0b) (prog-if 00 [VGA controller])
        Subsystem: Toshiba America Info Systems Device 0005
        Flags: bus master, fast devsel, latency 0, IRQ 46
        Memory at f0000000 (64-bit, non-prefetchable) [size=4M]
        Memory at e0000000 (64-bit, prefetchable) [size=256M]
        I/O ports at 3000 [size=64]
        [virtual] Expansion ROM at 000c0000 [disabled] [size=128K]
        Capabilities: <access denied>
        Kernel driver in use: i915
        Kernel modules: i915

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