** Description changed: - Test machine: Raven3-1 - Image: sutton-wilkes-xenial-amd64-20171016-3 + 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]) - BIOS: N25ET09W (0.09 ) Steps: - 1. Install image on Raven3-1 - 2. Login system - 3. Connect an external monitor - 4. Try to switch display modes in mirrored, extended, displayed on external or internal. + 1, Connect an external monitor + 2, Try to switch display modes in mirrored, extended, displayed on external or internal. - Expected result: - Video signal can be mirrored, extended, displayed on external or internal. + [Impact] + External HDMI monitor failed to show screen on Lenovo X1 yoga/carbon - Actual result: - Internal and mirror modes works. + [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.
-- 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: External HDMI monitor failed to show screen on Lenovo X1 series Status in HWE Next: New Status in linux package in Ubuntu: Incomplete 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
