Confirmed - the symptom is a kernel splat about "Attempting to execute userspace memory" triggered by Xorg with LR in ttm_bo_vm_fault - see attached screenshot (sorry!)
** Changed in: linux (Ubuntu) Status: Incomplete => Confirmed ** Attachment added: "splat.png" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1738334/+attachment/5022893/+files/splat.png -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1738334 Title: hisilicon hibmc regression due to ea642c3216cb ("drm/ttm: add io_mem_pfn callback") To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1738334/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs