24 Dec
2015
24 Dec
'15
11:41 a.m.
iadest(a)o2.pl composed on 2015-12-24 11:40 (UTC+0100):
> I've NEVER EVER needed to put any modeline in
any distro's xorg.conf,
> and I do a LOT of testing with different distro versions, Xorg
> versions, CRT and LCD displays, gfxchips and video drivers. Xorg
> calculates the modelines it needs if it has any valid data about the
> hardware. Usually EDID is sufficient. When not (e.g. invalid EDID),
> all it needs is the display's HorizSync and VertRefresh ranges, and
> the desired resolution.
Well, not always. I found some combinations of
displays and vieo cards
making the system not read EDID/DDC.
So did I. And in every case, providing Xorg with HorizSync and VertRefresh
ranges, and
desired resolution (PreferredMode in server versions since it was created;
previously, and currently with non-KMS drivers via 'Subsection
"Display"'s
'Modes'), provided all that was needed.
The rule is: If there is any problem with DDC/EDID, go
with modelines.
Again, Xorg's built in modeline calculator works as well as gtf or cvt, and
does so automatically, so manual modeline generation should be an absolute
last resort only when all else fails. Manual calculation is an absolute and
complete waste of time otherwise.
--
"The wise are known for their understanding, and pleasant
words are persuasive." Proverbs 16:21 (New Living Translation)
Team OS/2 ** Reg. Linux User #211409 ** a11y rocks!
Felix Miata *** http://fm.no-ip.com/