[haiku-bugs] Re: [Haiku] #8457: Blank screen after boot on Radeon Mobility 4670 HD

  • From: "kvark" <trac@xxxxxxxxxxxx>
  • Date: Sun, 08 Apr 2012 15:13:59 -0000

#8457: Blank screen after boot on Radeon Mobility 4670 HD
------------------------------------------+----------------------------
   Reporter:  kvark                       |      Owner:  kallisti5
       Type:  bug                         |     Status:  new
   Priority:  normal                      |  Milestone:  R1
  Component:  Drivers/Graphics/radeon_hd  |    Version:  R1/Development
 Resolution:                              |   Keywords:  blank radeon
 Blocked By:                              |   Blocking:
Has a Patch:  0                           |   Platform:  x86
------------------------------------------+----------------------------

Comment (by kvark):

 Replying to [comment:4 anevilyak]:
 > The reason it doesn't work that way is because it can't really. In the
 case of VESA the BIOS gives you a list of resolutions to choose based on
 an index value you pass in, and takes care of all the rest from there
 since it's all standardized. When using the actual driver, you no longer
 have the benefit of that, and consequently the driver has to actually
 compute the modelines, which entails computing constraints based on the
 monitor, etc., and consequently a lot more information potentially has to
 be supplied.

 No, of course, we do not want to compute the modelines. The driver
 generates a list of modes that are valid. All it needs to do is ''to find
 a mode in the list that matches the requested mode'', if there is any.

-- 
Ticket URL: <http://dev.haiku-os.org/ticket/8457#comment:5>
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