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/1738523 Title: [SRU] External HDMI monitor failed to show screen on Lenovo X1 series Status in HWE Next: New Status in linux package in Ubuntu: Fix Released Status in linux-oem package in Ubuntu: Invalid Status in linux source package in Xenial: Invalid Status in linux-oem source package in Xenial: Fix Released Status in linux source package in Artful: Fix Committed Status in linux-oem source package in Artful: Invalid Bug description: Thinkpad X1 yoga: CPU: Intel(R) Core(TM) i7-8550U CPU @ 1.80GHz (family: 0x6, model: 0x8e, stepping: 0xa) GPU: Intel Corporation Device [8086:5917] (rev 07) (prog-if 00 [VGA controller]) Steps: 1, Connect an external monitor 2, Try to switch display modes in mirrored, extended, displayed on external or internal. [Impact] External HDMI monitor failed to show screen on Lenovo X1 yoga/carbon [Fix] Add a workaround to bypass this TMDS_OE writing on identified laptop models. [Test Case] Tested on ThinkPad X1 yoga 2nd/3rd and Carbon 6th, external HDMI output OK. [Regression Potential] Low, it limits to ThinkPad specific laptops. To manage notifications about this bug go to: https://bugs.launchpad.net/hwe-next/+bug/1738523/+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
