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/1764194 Title: Dell Latitude 5490/5590 BIOS update 1.1.9 causes black screen at boot Status in linux package in Ubuntu: Fix Released Status in linux source package in Artful: Fix Committed Status in linux source package in Bionic: Fix Committed Bug description: == SRU Justification == This bug causes a Dell Latitude 5490/5590 with BIOS update 1.1.9 to get a black screen at boot. Specifying 'nomodeset' on the kernel command line works around the problem. Intel resolved the problem in upstream commit a3520b8992e5. This commit is now in mainline as of 4.17.rc2. It has also been cc'd to upstream stable. == Fix == a3520b8992e5 ("drm/i915/bios: filter out invalid DDC pins from VBT child devices") == Regression Potential == Low. This commit was also cc'd to upstream stable, so it recieved additional upstream review. Description: Ubuntu 16.04.4 LTS Release: 16.04 Ubuntu 16.04.4 LTS was installed to some Dell Latitude 5490 & 5590 laptops, originally running BIOS version 1.0.8. The install media and the installed OS was running linux-generic-hwe kernel 4.13.0. After upgrading BIOS to latest version 1.1.9, the kernel no longer boots: right after loading the i915 drm driver, the screen goes black, and the machine can only be reset or power cycled. This is true for both the installation media, and the OS instance previously installed to the disk and updated to the latest hwe kernel 4.13.0-38. Specifying 'nomodeset' on the kernel command line works around the problem by disabling the i915 drm driver functionality. In that case, several display driver function are obviously missing (eg GLX & xrandr). The problem manifested itself even when using the drm upstream latest git-head version. A custom built kernel was used to provide logs for this upstream bug report: https://bugs.freedesktop.org/show_bug.cgi?id=105549 The upstream Intel developers provided a patch, which was successfully tested by both the original reporter and me. https://patchwork.freedesktop.org/patch/216371/ https://github.com/freedesktop/drm-tip/commit/f212bf9abe5de9f938fecea7df07046e74052dde I backported this fix to ubuntu-xenial hwe git-head, and tested the result successfully. I'd like this fix to be added to the ubuntu- xenial linux-generic-hwe kernel. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1764194/+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
