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

  • From: "kvark" <trac@xxxxxxxxxxxx>
  • Date: Tue, 23 Oct 2012 03:09:55 -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):

 I've noticed 2 important messages in the syslog:

 1) VESA knows about the native panel mode (1366x768), which is a single
 mode reported under additional modes section. I have a feeling that these
 additional (or "detailed") modes should be marked somehow on our end,
 because they are always relevant (in contrast to ones in the standard mode

 2) radeon_hd does not even attempt to set the incorrectly detected mode
 (1400x1050). Instead, it tries to switch to 1024x768. As far as I got,
 it's the app_server that calls the accelerant to switch to this mode. I
 have no idea why that happens, and will look into that; however, it's all
 new to me, so the digging process is very slow :(

 Any help and thoughts on the matter are very welcome!

Ticket URL: <http://dev.haiku-os.org/ticket/8457#comment:17>
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