[Bug 95010] Screen Flickering on Intel Card

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=95010

--- Comment #35 from sascha at meta-x.de ---
I am on ArchLinux with kernel 4.12.4-1-ARCH and the problem still is present. 
Using the kernel parameter "i915.enable_rc6=0" makes it go away.

lspci -v output:

00:02.0 VGA compatible controller: Intel Corporation 3rd Gen Core processor
Graphics Controller (rev 09) (prog-if 00 [VGA controller])
        Subsystem: ASUSTeK Computer Inc. Device 1507
        Flags: bus master, fast devsel, latency 0, IRQ 32
        Memory at f7400000 (64-bit, non-prefetchable) [size=4M]
        Memory at d0000000 (64-bit, prefetchable) [size=256M]
        I/O ports at f000 [size=64]
        [virtual] Expansion ROM at 000c0000 [disabled] [size=128K]
        Capabilities: <access denied>
        Kernel driver in use: i915
        Kernel modules: i915

dmesg snippet:

[   54.358770] Setting dangerous option enable_rc6 - tainting kernel
[   54.359634] [drm] Memory usable by graphics device = 2048M
[   54.359636] checking generic (d0000000 7f0000) vs hw (d0000000 10000000)
[   54.359637] fb: switching to inteldrmfb from EFI VGA
[   54.359662] Console: switching to colour dummy device 80x25
[   54.359765] [drm] Replacing VGA console driver
[   54.365161] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013).
[   54.365163] [drm] Driver supports precise vblank timestamp query.
[   54.368216] i915 0000:00:02.0: vgaarb: changed VGA decodes:
olddecodes=io+mem,decodes=io+mem:owns=io+mem
[   54.383304] [drm] RC6 disabled, disabling runtime PM support
[   54.384426] [drm] Initialized i915 1.6.0 20170403 for 0000:00:02.0 on minor
0
[   54.384592] ACPI: Video Device [PEGP] (multi-head: yes  rom: yes  post: no)
[   54.385527] input: Video Bus as
/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:02/LNXVIDEO:00/input/input17
[   54.386294] ACPI: Video Device [GFX0] (multi-head: yes  rom: no  post: no)
[   54.401527] input: Video Bus as
/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/LNXVIDEO:01/input/input18


HTH

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