As I reported here: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video- amdgpu/+bug/1608042/comments/31
...my computer is exactly the same (Dell Inspiron 5448 laptop, BIOS A06, hybrid graphics Intel Broadwell - module i915 + AMD Topaz XT R7 M260/M265 - module amdgpu) and after installing 64-bit XUbuntu 16.04 "Xenial" I got the same problem, because of the kernel 4.4. I got rid of the kernel-AMD GPU issues after doing some reverse commit and identifying that kernel 4.6-rc1 received a "good commit" that fixed the problem. I'm currently running 4.6-rc7, but I can confirm that from 4.6-rc1 ahead the "NULL pointer dereference" bug's gone. From kernel 4.6-rc1 or newer I'm able to execute "DRI_PRIME=1 glxgears" without experiencing any issues. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1579374 Title: amdgpu causes NULL pointer dereference when trying to use Topaz (Radeon R7 M265) GPU To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1579374/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
