This bug is awaiting verification that the kernel in -proposed solves the problem. Please test the kernel and update this bug with the results. If the problem is solved, change the tag 'verification-needed- artful' to 'verification-done-artful'. If the problem still exists, change the tag 'verification-needed-artful' to 'verification-failed- artful'.
If verification is not done by 5 working days from today, this fix will be dropped from the source code, and this bug will be closed. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Thank you! ** Tags added: verification-needed-artful -- 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 Status in linux source package in Artful: Fix Committed Bug description: [SRU Justification] [Impact] On Artful kernels, X fails to start and a kernel splat is printed. This is cbecause ea642c3216cb ("drm/ttm: add io_mem_pfn callback") is incomplete: the hisilicon hibmc driver does not contain the callback and so the kernel tries to execute code at NULL. [Fix] There is a discussion and potential fix at https://lists.freedesktop.org/archives/dri-devel/2017-November/159002.html The fix hasn't landed yet and it looks like they're going to re-engineer the entire section instead. Rather than wait for that and deal with the massive regression potential, the fix I have picked to submit is very very minimal and touches only hibmc. [Regression Potential] Minimal - fix only touches hibmc driver. Tested on D05 board. [Testcase] Install patched kernel, try to start X. If it succeeds, the fix works. If there's a kernel splat, the fix does not work. [Notes] HiSilicon would really like this fix in Artful in such time so that when the next 16.04 point release ships in February, the HWE kernel will work with Xorg. 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 : email@example.com Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp