http://bugzilla.opensuse.org/show_bug.cgi?id=1004453 http://bugzilla.opensuse.org/show_bug.cgi?id=1004453#c49 --- Comment #49 from Max Staudt <mstaudt@suse.com> --- This seems to stem from the new IO_STRICT_DEVMEM option introduced in kernel v4.5 - it disallows userspace /dev/mem access to regions used by the kernel. This explains why you can start X with xf86-video-mga when booting in VGA 80x25 text mode, but not when booting with vesafb. Does booting with iomem=relaxed fix your X? If yes, please add iomem=relaxed to your boot parameters when using a v4.5 kernel or newer. This is basically the other thing to do after setting the X server setuid root in order to make old user mode setting drivers (such as xf86-video-mga) work. This change in the kernel has been introduced for security reasons, just like the DRI1 drivers are no longer included by default and the X server runs in user mode. Since there is nobody using the DRI1 driver for 3D, and thus no need to build the mga.ko kernel module, I think that setting this kernel option is the most comfortable workaround for you. -- You are receiving this mail because: You are on the CC list for the bug.