[haiku-bugs] Re: [Haiku] #17439: Intel NUC 8: No video output

  • From: "Haiku" <trac@xxxxxxxxxxxx>
  • To: undisclosed-recipients: ;
  • Date: Sun, 05 Dec 2021 22:48:14 -0000

#17439: Intel NUC 8: No video output
-------------------------------------------------+-------------------------
  Reporter:  beaglejoe                           |      Owner:  rudolfc
      Type:  bug                                 |     Status:  new
  Priority:  normal                              |  Milestone:  Unscheduled
 Component:                                      |    Version:
  Drivers/Graphics/intel_extreme/coffeelake      |  R1/Development
Resolution:                                      |   Keywords:
Blocked By:                                      |   Blocking:
  Platform:  All                                 |
-------------------------------------------------+-------------------------
Comment (by beaglejoe):

 Replying to [comment:34 rudolfc]:

Ah yes, you are applying the same non-packaged-system trick as I do.
 Thanks for clarifying.
I am looking over the code, maybe don't touch the lanes, as that's
 actually working OK.

Instead change the fixed base frequency to half that or double that (see
 which one will fix the refresh, I am guessing half the rate.

It's in Ports.cpp, routine _SetPortLinkGen8(), item LinkBandWidth (now
 270000).
This one I still need to autodetect as I tried to imply above.
 I changed Line 1457 to:

 {{{
 uint32 linkBandwidth = 135000; //khz
 }}}

 When booting to that install, I get "input not supported" right after boot
 icons.
 Will try 540000 next.

Let me know, OK? I'm very curious indeed ;-)
-- 
Ticket URL: <https://dev.haiku-os.org/ticket/17439#comment:36>
Haiku <https://dev.haiku-os.org>
The Haiku operating system.

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