[rescue] LCD hi res 17" monitor wanted

[Romain Dolbeau]

Le mar. 12 mars 2019 C  04:41, Sandwich Maker <adh at an.bradford.ma.us> a C)crit
:
> i was just playing with your line above and the numbers as explained in
> the fbfaq, and
> : uxga " 135000000,73811,60,20,189,20,6,6,18,1200,COLOR,0OFFSET"
> ;
> should work, unless i've added something wrong.  anyone in a position
> to check?

The bandwidth seems low (and you're missing the 1600 between the 20 and the
6).
At 60 Hz, VESA requires 162 MHz
(<https://www.mythtv.org/wiki/Modeline_Database#VESA_ModePool>)
(which becomes
"162000000,75000,60,64,192,304,1600,1,3,46,1200,COLOR,0OFFSET"),
I'm on the 75 Hz mode so a 202.5 MHz clock:
"202500000,93750,75,64,192,304,1600,1,3,46,1200,COLOR,0OFFSET"

Your low-freq solution might work, it depends on the display itself.
You can also extract the EDID value from the display in Linux to
get the 'proper' values (which may or may not work in practice).

> i observe that calculated decimals can apparently be rounded to
> integers - hfreq and vfreq come out to 73810.825587752872 and
> 60.008943089431, and in your line they were 61058.344640434196
> and 55.007517694085.  am i missing something?

No, seems to work fine that way...

Cordially,

--
Romain Dolbeau