http://bugzilla.opensuse.org/show_bug.cgi?id=1004453
http://bugzilla.opensuse.org/show_bug.cgi?id=1004453#c47
--- Comment #47 from Max Staudt ---
Turns out that the mga module is no longer included as of kernel v4.9-rc1, as
it is now hidden behind the CONFIG_DRM_LEGACY option:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?i...
Apparently xf86-video-mga has two ways of accessing the memory, either through
the DRI1 module, or by direct access via libpciaccess/sysfs. The latter should
still work if the X server is run as root, and it does on kernel v4.4, but not
on v4.9 (thus, the bug you reported). The failure backtrace is:
error in mmap
called by pci_device_linux_sysfs_map_range_wc
called by pci_device_linux_sysfs_map_range
called by pci_device_map_range
called by MGAMapMem
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