On Mi, 2014-03-12 at 14:55 +0100, Laszlo Ersek wrote: > On 03/12/14 13:55, Gerd Hoffmann wrote: > > Hi, > > > > This patch series adds new display devices. > > > > Number one is secondary-vga. That is identical to VGA (aka -vga std), > > except that it doesn't occupy all the legacy vga stuff (ioports, memory > > window @ 0xa0000), so you can have more than one of these in the system. > > It has one pci memory bar for the framebuffer and one mmio bar for > > registers. OVMF can drive it. Doesn't use it as console for some > > reason, but initializes it and the linux kernel will see it as efifb. > > My take is, due to the UEFI driver model, QemuVideoDxe is connected to > this secondary VGA (and so another GOP instance is created). It's then > probably up to GraphicsConsoleDxe to provide a SimpleTextOutput on top. > My guess (without looking) is that this too happens, again thanks to the > UEFI driver model. > > What could be amiss is likely something in ConSplitterDxe, which accepts > input from all consoles, and mirrors output to all of them as well. > Perhaps it doesn't expect multiple GOPs.
Must be something else, I see this behavior with secondary-vga being the only display device. It prints a single line saying something along the lines "display initialized", so SimpleTextOutput seems to be active. cheers, Gerd
