On Thu, Sep 4, 2008 at 1:14 PM, Chris Rankin wrote:

--- On Thu, 4/9/08, Alex Deucher wrote:

...

Not at the moment.

OK, thanks. But can I take this to mean that the hardware would at least allow this to happen? Could fglrx do this right now, for example?

It's doable hardware-wise, but I don't think anything supports this at the moment. Basically you'd render to a buffer in GART memory with the add-in card then blit it to the built-in chip for display. Alex -- To unsubscribe, e-mail: radeonhd+unsubscribe@opensuse.org For additional commands, e-mail: radeonhd+help@opensuse.org

This really requires building another layer of sophistication into the drivers. Basically the driver would need to understand the concept of doing modesetting on one GPU but (when appropriate) doing acceleration on the other GPU. Add Compiz to the mix and it gets exciting ;) -----Original Message----- From: Chris Rankin [mailto:rankincj@yahoo.com] Sent: Thursday, September 04, 2008 3:10 PM To: Alex Deucher Cc: radeonhd@opensuse.org Subject: Re: [radeonhd] Thinkpad T60p with on-board M66 and docking station. --- On Thu, 4/9/08, Alex Deucher wrote:

It's doable hardware-wise, but I don't think anything supports this at

the moment. Basically you'd render to a buffer in GART memory with the add-in card then blit it to the built-in chip for display.

OK, I was hoping that maybe the docking station internals would allow the new graphics card to appear as another PCI Express device on the bus, and then the driver could somehow connect the LCD panel to it purely through configuration. Trust "reality" to be slightly more complicated. Probably with a performance penalty too. Cheers, Chris -- To unsubscribe, e-mail: radeonhd+unsubscribe@opensuse.org For additional commands, e-mail: radeonhd+help@opensuse.org -- To unsubscribe, e-mail: radeonhd+unsubscribe@opensuse.org For additional commands, e-mail: radeonhd+help@opensuse.org

On Thu, 2008-09-04 at 13:41 -0400, Alex Deucher wrote:

On Thu, Sep 4, 2008 at 1:14 PM, Chris Rankin wrote:

...

--- On Thu, 4/9/08, Alex Deucher wrote:

...

Not at the moment.

OK, thanks. But can I take this to mean that the hardware would at least allow this to happen? Could fglrx do this right now, for example?

It's doable hardware-wise, but I don't think anything supports this at the moment. Basically you'd render to a buffer in GART memory with the add-in card then blit it to the built-in chip for display.

Looks like some core Xorg concepts should be reworked to support this. Like plug/unplug new video hardware "on fly" in running copy of Xorg. On another side, probably, it will be not to hard to make it work with Xinerama (with all xinerama limitations of course) and Xserver restart. But I really have no idea how to handle disconnection of hardware from running Xserver.

Alex

P.S. I have same doc station, and even tried to play a bit with external video card. -- Vladimir B. Grebenschikov vova@fbsd.ru -- To unsubscribe, e-mail: radeonhd+unsubscribe@opensuse.org For additional commands, e-mail: radeonhd+help@opensuse.org