[Intel-gfx] Setting proper video mode
ajax at redhat.com
Mon Oct 31 17:42:47 CET 2011
On 10/29/11 9:00 AM, Jarek wrote:
> Is there something beside the modeline, which my affect setting display
> mode ? How to compare what is set with iegd that the display is working,
> and how to force xf86-video-intel to do the same ?
The first thing that comes to mind is infoframe setup for HDMI. Is this
an HDMI display?
Also, how does the output of intel_reg_dumper compare between the two
> The modeline is exactly the same, except refresh rate, which in iegd is
> 61Hz, and in xf86-video-intel is 61.7 - I don't think that such small
> difference may affect the display.
If they're exactly the same then they can't really have different
refresh rates. Refresh rate is a derived quantity, the modeline
actually stores the pixel clock rate. If you were seeing different
refresh rates in the log file then you were seeing an artifact of the
roundoff math of the thing printing them.
On the other hand you might be reporting the refresh rate as seen on the
LCD's on-screen display, if it has one, in which case it's a little
weirder. That would indicate that you really are sending different
timings to the display, possibly because the PLL search code in iegd
picked a different answer. But dumping the m/n/p registers would tell you.
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