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...sort of a regular DRM client and exposes the FBDEV API. > > The overallocation logic was added to this emulation layer in commit > 5f15257689bfa, which is included in v4.12 and later kernels. > > Hope this helps, > > -ilia > > On Sun, Jul 5, 2020 at 7:02 PM Michael T. Kloos > <michael at michaelkloos.com> wrote: >> Well...it's been a bit of a mixed bag. Setting >> drm_kms_helper.drm_fbdev_overalloc=200 set the vinfo.yres_virtual to >> 2160 as opposed to 1080 (My monitor vertical resolution) This fixed the >> mmap() problem. Howe...

...3:45 PM, Ilia Mirkin wrote: > 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 at michaelkloos.com> 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 cau...

...<br type="attribution" /><blockquote class="quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><p dir="ltr">Are you setting the overallocation to 200? <br> <br> On Sun, Jul 5, 2020 at 3:41 AM Michael T. Kloos <br> <michael@michaelkloos.com> wrote: <br> > <br> > Does NOUVEAU support mmaping a double-sized Framebuffer? <br> > When attempting to run, where fd refers to "/dev/fb0": <br> > <br> > mmap(ptr, screensize * 2, PROT_READ | PROT_WRI...

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? -------------- next part -------------- An HTML attachment was

...applications. The fbdev emulation acts as sort of a regular DRM client and exposes the FBDEV API. The overallocation logic was added to this emulation layer in commit 5f15257689bfa, which is included in v4.12 and later kernels. Hope this helps, -ilia On Sun, Jul 5, 2020 at 7:02 PM Michael T. Kloos <michael at michaelkloos.com> wrote: > > Well...it's been a bit of a mixed bag. Setting > drm_kms_helper.drm_fbdev_overalloc=200 set the vinfo.yres_virtual to > 2160 as opposed to 1080 (My monitor vertical resolution) This fixed the > mmap() problem. However, it only wor...

Are you setting the overallocation to 200? On Sun, Jul 5, 2020 at 3:41 AM Michael T. Kloos <michael at michaelkloos.com> 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 argumen...

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 at michaelkloos.com> 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 ca...

...org Summary: [NV98] On recent Linux kernel (3.13 and 3.14), the GPU locks up around the time an X server starts QA Contact: xorg-team at lists.x.org Severity: major Classification: Unclassified OS: Linux (All) Reporter: jkloos at mpi-sws.org Hardware: x86-64 (AMD64) Status: NEW Version: unspecified Component: Driver/nouveau Product: xorg Created attachment 97525 --> https://bugs.freedesktop.org/attachment.cgi?id=97525&action=edit dmesg output, as of running L...