Hello all, I would like to propose an option to enable multiple heads (outputs) on startup when the "max_outputs" option is used on a vga device. Currently, only 1 head is enabled by default, and all others are enabled in response to commands from the host side UI interface. There is also an issue on gitlab that describes this situation (https://gitlab.com/qemu-project/qemu/-/issues/1107)
The main application that I am thinking of is for running headless for CI testing of Yocto images. In this configuration, it can be sufficient to grab a screenshot of the display from within the guest for testing purposes. To do this, however, the DRM connectors must appear to be connected in the guest. For now, I've just implemented a simple option that will enable all of the heads on a virtio-vga/gpu device as an illustration, and was hoping to get some feedback on the concept. If there is agreement I can extend this out to qxl as well. I have tested this with the following -display settings: none, gtk, sdl, vnc. Thank you, Damian Damian Hobson-Garcia (2): gtk: Make sure widget is realized before updating virtio-gpu: Add an option to connect all outputs on startup hw/display/virtio-gpu-base.c | 12 +++++++++--- include/hw/virtio/virtio-gpu.h | 7 ++++++- ui/gtk.c | 4 ++++ 3 files changed, 19 insertions(+), 4 deletions(-) -- 2.25.1
