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

  • From: "anevilyak" <trac@xxxxxxxxxxxx>
  • Date: Sun, 08 Apr 2012 15:09:24 -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 anevilyak):

 Replying to [comment:2 kvark]:
 > Thank you anevilyak. It would be very useful if I could really force the
 resolution from the boot menu, regardless of the driver used.

 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.

Ticket URL: <http://dev.haiku-os.org/ticket/8457#comment:4>
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