Mailinglist Archive: opensuse-factory (661 mails)

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Re: [opensuse-factory] Kernel Mode Setting (KMS) for openSUSE.
  • From: Rob OpenSuSE <rob.opensuse.linux@xxxxxxxxxxxxxx>
  • Date: Fri, 4 Dec 2009 08:09:19 +0000
  • Message-id: <ce9d8ed60912040009i34bf7349y6c1bf69ce36f7bd3@xxxxxxxxxxxxxx>
2009/12/4 Egbert Eich <eich@xxxxxxx>:
On Thu, Dec 03, 2009 at 07:27:58PM -0500, Felix Miata wrote:
On 2009/12/03 14:38 (GMT+0100) Egbert Eich composed:

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

Nvidia GS8300 was fairly recent card DX 10 card (2 years old) which
did not pass DDC info through. I presume KMS will help with that sort
of situation with an auto-configure X, because on boot you can tell
the kernel what mode to use and hopefully that selection will be
respected by X.

At the moment, the auto-configure might annoy the user by choosing
non-ideal mode.

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)
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.

Isn't the point, that when the same mode is used for virtual console &
X, that you avoid flicker & unecessary re-setting modes when they have
not changed.

Instead of kernel and X changing modes, the kernel has full
responsibility rather than sharing it with user space.

So KMS has to support the X RandR resolution mode changes offered by
user-space tools.

Rob
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