[haiku-bugs] Re: [Haiku] #12723: intel_extreme: Implement hardware panel scaling where possible

  • From: "Haiku" <trac@xxxxxxxxxxxx>
  • To: undisclosed-recipients: ;
  • Date: Sat, 04 Jan 2020 12:01:49 -0000

#12723: intel_extreme: Implement hardware panel scaling where possible
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   Reporter:  kallisti5                       |      Owner:  pulkomandy
       Type:  enhancement                     |     Status:  assigned
   Priority:  normal                          |  Milestone:  Unscheduled
  Component:  Drivers/Graphics/intel_extreme  |    Version:  R1/Development
 Resolution:                                  |   Keywords:  scaler panel
                                              |  lvds
 Blocked By:                                  |   Blocking:
Has a Patch:  0                               |   Platform:  All
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Changes (by pulkomandy):

 * owner:  kallisti5 => pulkomandy

Comment:

 I'm testing with an Intel G45 machine today. It seems we really need this.
 All our attempts to drive the LVDS panel at non-native resolution result
 in a black screen. This happens quite easily if there is an external VGA
 display, for example, since we try to use the EDID info from there also
 for the internal display.

 If I understand Intel docs correctly, the LVDS panel should always be
 driven at its native resolution, and the panel fitter configured to take
 care of the resizing so that whatever resolution we put in is scaled to
 what the panel needs.

 If we get this right, we should end up with a working "clone" display
 setup, and one step closer to dual-screen support on these devices.
-- 
Ticket URL: <https://dev.haiku-os.org/ticket/12723#comment:5>
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