Hi Michael, On Tuesday 04 September 2012 23:37:46 Michael Rodríguez-Torrent wrote: > Looking at nvidia-settings, I can see that both graphics chips are > recognized. GPU 0 (integrated) has "X screens: Screen 0" and "Display > Devices: Seiko/Epson (DFP-0)" (which is the laptop screen, while GPU 1 has > "X screens: None" and "Display Devices: CRT-0 (CRT-0)" (?) Looks logical to me. That CRT-0 is possibly not connected to anthing (I have the same unconnected CRT-0 here as many others do). Your laptop is not an Optimus laptop if you were wondering that.
> So, the discrete card is always running and somehow gets configured with a > (bogus?) display, while the integrated card gets the laptop LCD. Well, if there was an Intel iGPU taking it, there would be no use for the second nvidia card right? > I found that a lot of people have posted about trying to set the BusID in > xorg.conf to that of the discrete card. I tried this as well but, like > them, found this resulted in the laptop screen going blank once X starts. > Is there a reason that the card wouldn't be driving the display? If the discrete GPU is not connected to a screen, surely you get a blank screen. > Is there something more I can do to tie them together? Maybe https://wiki.archlinux.org/index.php/Dell_Studio_XPS_13 > I've also had a look at the ACPI tables (e.g. > https://launchpadlibrarian.net/24358773/DSDT.dsl), and I can see that the > calls to switch the discrete card on and off are obvious because of their > debug logging ("MXM on/off"). There are two other methods in the same > scope, "HSTA" and "_ROM," but I can't tell what they're for. How can I > decipher them? Just trial and error? "STA" reports a status (whether the device is on or off). _ROM is mentioned in the ACPI Spec (http://www.acpi.info/spec.htm) and returns the Video BIOS. > Maybe I need to somehow configure X to tell the nvidia driver to ignore the > integrated GPU device so that it configures the discrete device to use the > laptop LCD. Or is there some other reason that nvidia isn't letting me > assign that monitor to the discrete device? Again, try https://wiki.archlinux.org/index.php/Dell_Studio_XPS_13 Regards, Peter _______________________________________________ Mailing list: https://launchpad.net/~hybrid-graphics-linux Post to : hybrid-graphics-linux@lists.launchpad.net Unsubscribe : https://launchpad.net/~hybrid-graphics-linux More help : https://help.launchpad.net/ListHelp