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 Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1738334 Title: hisilicon hibmc regression due to ea642c3216cb ("drm/ttm: add io_mem_pfn callback") Status in linux package in Ubuntu: Confirmed Bug description: ea642c3216cb ("drm/ttm: add io_mem_pfn callback") is incomplete: the hisilicon hibmc driver does not contain the callback and so X does not start. Discussion and potential fix at https://lists.freedesktop.org/archives /dri-devel/2017-November/159002.html This affects Artful, upstream has not landed on a solution yet as far as I can tell, so lets backport the first proposed small fix. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1738334/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp