[haiku-bugs] Re: [Haiku] #7655: Resolution 640x480 the only one available -- driver using own EDID interp. instead of (more complete) common code's EDID interpretation
- From: "ttcoder" <trac@xxxxxxxxxxxx>
- Date: Sun, 03 Jul 2011 15:50:17 -0000
#7655: Resolution 640x480 the only one available -- driver using own EDID
interp.
instead of (more complete) common code's EDID interpretation
---------------------------------------+----------------------------
Reporter: ttcoder | Owner: rudolfc
Type: bug | Status: new
Priority: normal | Milestone: R1
Component: Drivers/Graphics/nVidia | Version: R1/Development
Resolution: | Keywords:
Blocked By: | Blocking:
Has a Patch: 1 | Platform: All
---------------------------------------+----------------------------
Comment (by ttcoder):
Turns out I have to do some voodoo hoodoo to boot now: I have to change
the ''VESA resolution in the boot menu safe options'', in order to get a
good monitor sync from the ''nVidia'' accelerant..
Behavior if I fail to choose the 800x600 '''VESA''' resolution (or if I
pick any other resolution):
- VESA does not work (strange... VESA worked in 41834, regardless of
whether or not I chose a specific resolution)
- '''nVidia''' does not work (even stranger! how can nVidia be affected by
the boot menu resolution selection ??): it tries to setup 640x480 at 1900
(!) MHz pixel-clock
Behavior if I select 800x600 VESA resolution:
- VESA indeed works in 800x600
- nVidia is able to display both 640x480 at a correct 30.5 MHz pixel
clock, and 800x600
This could be linked to our above discussion (i.e. the nVidia accelerant
does not play nice with create_display_modes()) but I don't think so,
since the VESA accelerant is also affected.
So I'll file a distinct ticket soon, insisting on the VESA side of the
equation as this should be easier to reproduce and debug. (i.e. the fact
that VESA requires a specific resolution to be picked otherwise it fails,
whereas it was smart enough to pick a resolution on its own in 41834). And
when that gets fixed it will probably also fix the nVidia problem,
allowing me to boot this PC without trouble.
--
Ticket URL: <http://dev.haiku-os.org/ticket/7655#comment:11>
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