Michael Ellerman <mpe@xxxxxxxxxxxxxx> writes: > Daniel Axtens <dja@xxxxxxxxxx> writes: > >> Currently, we do a PCI fixup to mark a default card so that Xorg >> autoconfiguration works. >> >> There is a new generic method to do this sort of vga fixup, and >> it occurs by default. >> >> Drop our old method. >> >> This method is different: >> - it will only mark a card as default if a driver is bound >> - the marking will happen at late_initcall time, or even later >> if a card is enabled later on (via an ENABLE hook). Currently >> things are enabled in a FINAL hook. >> >> This *does* change behaviour under some circumstances. >> >> For example, pseries_le_defconfig doesn't have DRM drivers for >> many of the qemu GPU models, including the 'standard' vga. > > Should we enable them/it? Hard to say. The 'standard' vga module (bochs_drm) was blacklisted by Ubuntu - apparently at IBM's request [0] - some years back. Even if you un-blacklist it, I had trouble with getting it and the openfirmware framebuffer driver to play nicely together. It may not be worth the trouble for bochs_drm. There's a better case for including some of the more modern drivers - maybe QXL and virtio - but I wasn't able to test them: my particular build of qemu/TCG refused to start with them and I didn't feel like rebuilding/debugging qemu. It would also be legitmate to say that you're focussing on headless use with pseries_*defconfig and not include them: you need to bring in the DRM core if you want these drivers. HTH. Regards, Daniel [0] https://bugs.launchpad.net/ubuntu/+source/kmod/+bug/1378648 > > cheers
