On Tue, Jun 02, 2020 at 04:06:32PM +1000, Dave Airlie wrote: > James Jones (4): ... > drm/nouveau/kms: Support NVIDIA format modifiers This commit is the first one that breaks Xorg startup for my setup: GTX 1080 + Dell UP2414Q (4K DP MST monitor). I believe this is the crucial part of dmesg (full dmesg is attached): [ 29.997140] [drm:nouveau_framebuffer_new] Unsupported modifier: 0x300000000000014 [ 29.997143] [drm:drm_internal_framebuffer_create] could not create framebuffer [ 29.997145] [drm:drm_ioctl] pid=3393, ret = -22 Any suggestions? -- Kirill A. Shutemov