Mailinglist Archive: opensuse-factory (661 mails)

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Re: [opensuse-factory] Kernel Mode Setting (KMS) for openSUSE.
  • From: Felix Miata <mrmazda@xxxxxxxxxxxxx>
  • Date: Fri, 04 Dec 2009 03:05:41 -0500
  • Message-id: <4B18C2D5.9080609@xxxxxxxxxxxxx>
On 2009/12/04 08:19 (GMT+0100) Egbert Eich composed:

On Thu, Dec 03, 2009 at 19:27:58 -0500, Felix Miata wrote:

Is it naive to expect KMS will have no negative impact on my ability to run
1856x1392 on tty7 while running 1400x1050 on tty8 while running 1024x768 on
tty9 using a single gfx card and display and open source driver?

This begs the question why you want to do this.

Because I can (and do) now, and don't want to lose the ability. :-)

Better answer: Web site development flexibility. It's easier to see what
users see using different settings when you use some of their settings life
size. It's a lot more comfortable to do the evaluations without the head
turning required using the multiple displays required if sticking to native
flat panel resolutions. A quality CRT can run the gamut of resolutions too.
To run the gamut with LCDs would take a mountain of wiring and physical
space, not to mention all the extra hardware. AFAIK what I asked about and do
is impossible on a Mac or Windoz.

Or maybe I want the same mode on more than one, but without panning enabled
on one (straight 1600x1200), and with on another (1600x1200 plus panning to
1920 wide to emulate WUXGA).

The majority of users today run flat panel monitors (I know there are
exceptions and there is no need to try to convince me differently).

FWIW, did you happen to notice that 100% of the modes I listed are 4:3 modes
that few currently available-on-store-shelves LCDs can do?

Flat panels work well on their native resolution. Anything other
than native resolution will get rescaled internally and will look
fuzzy or blurry in some way. Thus you want to run it at its native
resolution as much as possible.

Which is why I use a 4:3 CRT.

DDC tells the 'preferred mode' and KMS will try to set it on startup.
This should prevent you from ever having to switch modes.

Less flexibility is not for me. I'll clip the DDC pin off the cable's plug if
I have to to prevent smarty pants X from telling me what mode I must use on a
CRT.

However there is nothing in KMS that prevents you from switching modes.
I'm not sure if you can have different resolutions on different virtual
text consoles (or if chaning it for one console it will change it for all)

This is the inverse of the question I originally asked. I'd normally rather
all text consoles use the same, but might on occasion want different.

but if you run X for example it will be able to set a different resolution
than your text console.

There is nothing in the design of KMS that would prevent this.

I hope. Quoting you from several hours ago: "It often doesn't work that way.
Devs often have high flying goals and discover in the end the hard way that
they cannot deliver."
--
" We have no government armed with power capable of
contending with human passions unbridled by morality and
religion." John Adams, 2nd US President

Team OS/2 ** Reg. Linux User #211409

Felix Miata *** http://fm.no-ip.com/
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