Try booting with drm_kms_helper.drm_fbdev_overalloc=200 and see if it works with that. (There's also CONFIG_DRM_FBDEV_OVERALLOC which sets the default.) Cheers, -ilia On Sun, Jul 5, 2020 at 3:41 PM <michael@xxxxxxxxxxxxxxxx> wrote: > > I am not familiar with that setting, but I have really struggled to find documentation on dealing with the framebuffer. Referring to this guide, "http://betteros.org/tut/graphics1.php#doublebuffer";, I attempted to set the mmap allocation size to double, but it caused the mmap to fail. I no longer believe that it is a driver issue, though, because I just tried it again on a dell laptop with Intel HD Graphics 4400 to the same failure. > > On Jul 5, 2020 12:35, Ilia Mirkin <imirkin@xxxxxxxxxxxx> wrote: > > Are you setting the overallocation to 200? > > On Sun, Jul 5, 2020 at 3:41 AM Michael T. Kloos > <michael@xxxxxxxxxxxxxxxx> wrote: > > > > Does NOUVEAU support mmaping a double-sized Framebuffer? > > When attempting to run, where fd refers to "/dev/fb0": > > > > mmap(ptr, screensize * 2, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0); > > > > I get back an invalid argument error. This doesn't happen if I only > > request a single screensize. Is this a limitation of the driver? > > > > _______________________________________________ > > Nouveau mailing list > > Nouveau@xxxxxxxxxxxxxxxxxxxxx > > https://lists.freedesktop.org/mailman/listinfo/nouveau > > _______________________________________________ Nouveau mailing list Nouveau@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/nouveau
