[haiku-bugs] Re: [Haiku] #7441: Intel Extreme Driver Does Not Work With Intel Atom N450

#7441: Intel Extreme Driver Does Not Work With Intel Atom N450
-------------------------------------+-------------------------------------
   Reporter:  sotrud_nik             |      Owner:  axeld
       Type:  enhancement            |     Status:  new
   Priority:  normal                 |  Milestone:  R1
  Component:                         |    Version:  R1/Development
  Drivers/Graphics/intel_extreme     |   Keywords:  intel_extreme atom n450
 Resolution:                         |  videocard
 Blocked By:                         |   Blocking:
Has a Patch:  0                      |   Platform:  All
-------------------------------------+-------------------------------------

Comment (by sotrud_nik):

 While looking into source code and logs, I found that there is a wrong
 pixel clock error.
 I believe, it's in a '''compute_pll_divisors''' function, file '''src/add-
 ons/accelerants/intel_extreme/mode.cpp'''.
 It looks like getting edid info from monitor failed both on A and C (lvds)
 ports. Then it falls back to BIOS's mode, which found correctly
 (1024x600), then requestedPixelClock was set to 7.257 MHz, but required
 one is 52.0 MHz. I took this value from the '''xrandr --verbose''' output,
 under Linux.

 Is it intel_accelerant's, or ddc2_read_edid1's error?

 I manually set it to 52.0, recompiled and replaced
 intel_extreme.accelerant, and it worked. Of course, 1024x600 screen
 resolution only available.


 This bug should be renamed to '1024x600 screen resolution doesn't work on
 Acer Aspire AO532h'.

-- 
Ticket URL: <http://dev.haiku-os.org/ticket/7441#comment:4>
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