[Bug 60009] New: Black laptop screen and external monitor has flickering problem

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=60009

          Priority: medium
            Bug ID: 60009
          Assignee: chris at chris-wilson.co.uk
           Summary: Black laptop screen and external monitor has
                    flickering problem
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
          Severity: normal
    Classification: Unclassified
                OS: All
          Reporter: benny at ammitzboell-consult.dk
          Hardware: Other
            Status: NEW
           Version: unspecified
         Component: Driver/intel
           Product: xorg

Created attachment 73821
  --> https://bugs.freedesktop.org/attachment.cgi?id=73821&action=edit
Xorg.0.log

My laptop is an HP Envy 17 3D. I am running Gentoo and using vgaswitcheroo to
switch between radeon and intel (i915). I have the radeon driver working with
some difficulty (see https://bugs.freedesktop.org/show_bug.cgi?id=58894) - i.e.
I have to attach an external monitor to get the laptop screen turned on after
KDE has started.

I would like to be able to use the intel driver and switch off the radeon chip
because it uses much less power. I can do this using vgaswitcheroo, but the
intel driver gives me 2 problems:

1) The laptop screen stays black after the boot process has completed. If I
attach an external monitor I can get a picture on that, but the laptop screen
just stays black.

2) Moving the mouse pointer to the top left corner (rather, the top left square
of maybe 1/3 of the screen) the screen starts to flicker from the mouse pointer
and downwards.

I also notice that it takes quite a while before KDE displays anything during
the boot with the intel driver enabled compared to the time it takes if the
radeon driver is used.

bla-hpenvy17 ~ # lspci -nn | grep VGA
00:02.0 VGA compatible controller [0300]: Intel Corporation 2nd Generation Core
Processor Family Integrated Graphics Controller [8086:0116] (rev 09)
01:00.0 VGA compatible controller [0300]: Advanced Micro Devices [AMD] nee ATI
Whistler XT [AMD Radeon HD 6700M Series] [1002:6740] (rev ff)

I notice that the radeon driver uses eDP-1 as output to laptop screen and intel
driver uses eDP-2. I think perhaps the laptop screen is still showing the
output from the radeon chip, which gives the black screen.

Let me know if you need any more information.

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