[Intel-gfx] Regression in v4.8-rc4: i915 flickering since commit 1c80c25fb6

Dominik Brodowski linux at dominikbrodowski.net
Sun Sep 4 19:11:53 UTC 2016


Hi!

Since commit 1c80c25fb6 (determined by git bisect, and confirmed by
reverting this patch on top of 9ca581b50d), the sceen on my DELL XPS 13
is flickering every once in a while (sometimes multiple times per
second, sometimes only every few seconds).

That's for

00:02.0 VGA compatible controller: Intel Corporation Broadwell-U Integrated Graphics (rev 09) (prog-if 00 [VGA controller])
        Subsystem: Dell Device 0665
        Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx+
        Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
        Latency: 0
        Interrupt: pin A routed to IRQ 42
        Region 0: Memory at f6000000 (64-bit, non-prefetchable) [size=16M]
        Region 2: Memory at e0000000 (64-bit, prefetchable) [size=256M]
        Region 4: I/O ports at f000 [size=64]
        [virtual] Expansion ROM at 000c0000 [disabled] [size=128K]
        Capabilities: <access denied>
        Kernel driver in use: i915

and Debian Jessie userland.

Best,
	Dominik


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