Re: Flickering with Intel i7-5700 (HD 5600) and Samsung 156HL01-102 panel

Thanks! I'll try this as soon as I can (probably over the weekend) and
report back.

Regards,

Jordi
El dia 10/11/2015 2:27 p. m., "Albert Freeman" <[email protected]>
va escriure:

> On 10 November 2015 at 13:10, Albert Freeman <[email protected]>
> wrote:
> > On 8 November 2015 at 19:05, Jordi Salvat i Alabart
> > <[email protected]> wrote:
> >> Noone? Not even a hint on where I could ask for help?
> >>
> >> :'-(
> >>
> >>
> >>
> >> 2015-10-26 0:18 GMT+01:00 Jordi Salvat i Alabart
> >> <[email protected]>:
> >>>
> >>> Hi,
> >>>
> >>> My new MSI PE60 2QE laptop mounts an Intel i7-5700HQ, which carries the
> >>> Integrated Graphics Chipset 5600, and a Samsung 156HL01-102 panel.
> >>>
> >>> The display works perfectly when I boot with the "nomodeset" parameter
> in
> >>> the kernel command line -- but then I'm forced to use the framebuffer
> >>> driver, which doesn't allow multiple monitors.
> >>>
> >>> With KMS enabled (by removing the "nomodeset" parameter), X starts
> >>> correctly with the "intel" driver and I can use multiple monitors, but
> the
> >>> laptop's panel shows an irregular flicker, ranging from occasional
> >>> flickering horizontal black lines (which are really annoying) to a
> constant
> >>> flashing & flickering making the display all but unusable.
> >>>
> >>> The flickering and flashing is less noticeable, but still there, in the
> >>> text-mode VTs, even if I never start X. So the problem has to be in the
> >>> kernel or modules, not in the X drivers.
> >>>
> >>> External monitors connected to the DP or HDMI ports don't show any
> >>> flickering.
> >>>
> >>> Things I have tried (among many others I've discovered were
> irrelevant):
> >>>
> >>> Setting a number different video modes using xrandr
> >>> Booting with Kernel 3.19.0.25 with i915.enable_IPS=0 as suggested here:
> >>> Screen flickering on Ubuntu Gnome 14.04 - 4K resolution
> >>> Booting with i915.powersave=0
> >>> Booting with acpi_osi=Linux
> >>> Upgrading to Ubuntu Vivid Vervet (kernel 3.19.0 with a backported i915
> >>> module)
> >>> Upgrading to Ubuntu Willy Werewolf (kernel 4.2.0)
> >>>
> >>> None of these have helped.
> >>>
> >>> I'm attaching kern.log for a full boot sequence with drm.debug=0xf.
> >>>
> >>> What steps can you recommend to try to diagnose and solve this problem?
> >>>
> >>> Thanks a lot for your help,
> >>>
> >>> Jordi
> >>>
> >>
> >>
> >> _______________________________________________
> >> mesa-users mailing list
> >> [email protected]
> >> http://lists.freedesktop.org/mailman/listinfo/mesa-users
> >>
> > Does this solve the issue (it solves a issue with your monitor) (it is
> > applied ontop of the latest linus kernel tree at time of writing):
> > diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
> > index 05bb731..44c9422 100644
> > --- a/drivers/gpu/drm/drm_edid.c
> > +++ b/drivers/gpu/drm/drm_edid.c
> > @@ -139,6 +139,9 @@ static struct edid_quirk {
> >
> >         /* Panel in Samsung NP700G7A-S01PL notebook reports 6bpc */
> >         { "SEC", 0xd033, EDID_QUIRK_FORCE_8BPC },
> > +
> > +       /* Panel in Samsung 156HL01-102 display (for notebook) reports
> > 6bpc instead of 8bpc */
> > +       { "SDC", 0x324c, EDID_QUIRK_FORCE_8BPC },
> >  };
> >
> >  /*
> >
> >
> >
> > !!!OR!!! Since the DRM is trying to force part of your monitor into 36
> > bit mode, maybe this:
> >
> >
> >
> > diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
> > index 05bb731..44c9422 100644
> > --- a/drivers/gpu/drm/drm_edid.c
> > +++ b/drivers/gpu/drm/drm_edid.c
> > @@ -139,6 +139,9 @@ static struct edid_quirk {
> >
> >         /* Panel in Samsung NP700G7A-S01PL notebook reports 6bpc */
> >         { "SEC", 0xd033, EDID_QUIRK_FORCE_8BPC },
> > +
> > +       /* Panel in Samsung 156HL01-102 display (for notebook) reports
> > 6bpc instead of 12bpc */
> > +       { "SDC", 0x324c, EDID_QUIRK_FORCE_12BPC },
> >  };
> >
> >  /*
> Sorry those patches don't apply properly, here are ones that do
>

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