apport information ** Tags added: apport-collected xenial
** Description changed: I'm using UX21A Asus Zenbook Prime. When I connected HDMI socket to an external display and turn on the laptop, Ubuntu didn't show build in display even it said display was recognized and activated. It happened on Ubuntu 16.04 and Linux Mint 18 Mint even when they were started as Live USB booting. When I switched off the build in display and reactivate it through Display Setting GUI, it started showing. But with xrandr command, it didn't. I unplugged HDMI and turn on the laptop and plug HDMI again after confirmed the BIOS Logo, the problem didn't show up. The situation I confirmed on several environment were all the same. It suppose to be caused by a problem which the laptop considers the external display as primary one. So currently, I unplug the HDMI when I start it up. I also asked in askubuntu.com but it doesn't seem I could get the feedback. This is my first bug repport and please be kind. sudo lspci -vnvn > lspci-vnvn.log returns Ubuntu 4.4.0-38.57-generic 4.4.19 + --- + ApportVersion: 2.20.1-0ubuntu2.1 + Architecture: amd64 + AudioDevicesInUse: + USER PID ACCESS COMMAND + /dev/snd/controlC0: zenbook 1475 F.... pulseaudio + CurrentDesktop: X-Cinnamon + DistroRelease: Ubuntu 16.04 + HibernationDevice: RESUME=UUID=51f4543d-f960-4aea-8840-72631c112329 + InstallationDate: Installed on 2016-10-05 (4 days ago) + InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64(20160426.1) + MachineType: ASUSTeK COMPUTER INC. UX21A + Package: linux (not installed) + ProcFB: 0 inteldrmfb + ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-38-generic.efi.signed root=UUID=cce15b3a-8ba8-40d2-a621-c8b542bb3484 ro quiet splash vt.handoff=7 + ProcVersionSignature: Ubuntu 4.4.0-38.57-generic 4.4.19 + RelatedPackageVersions: + linux-restricted-modules-4.4.0-38-generic N/A + linux-backports-modules-4.4.0-38-generic N/A + linux-firmware 1.157.3 + Tags: xenial + Uname: Linux 4.4.0-38-generic x86_64 + UpgradeStatus: No upgrade log present (probably fresh install) + UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo + _MarkForUpload: True + dmi.bios.date: 11/14/2012 + dmi.bios.vendor: American Megatrends Inc. + dmi.bios.version: UX21A.216 + dmi.board.asset.tag: ATN12345678901234567 + dmi.board.name: UX21A + dmi.board.vendor: ASUSTeK COMPUTER INC. + dmi.board.version: 1.0 + dmi.chassis.asset.tag: No Asset Tag + dmi.chassis.type: 10 + dmi.chassis.vendor: ASUSTeK COMPUTER INC. + dmi.chassis.version: 1.0 + dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrUX21A.216:bd11/14/2012:svnASUSTeKCOMPUTERINC.:pnUX21A:pvr1.0:rvnASUSTeKCOMPUTERINC.:rnUX21A:rvr1.0:cvnASUSTeKCOMPUTERINC.:ct10:cvr1.0: + dmi.product.name: UX21A + dmi.product.version: 1.0 + dmi.sys.vendor: ASUSTeK COMPUTER INC. ** Attachment added: "AlsaInfo.txt" https://bugs.launchpad.net/bugs/1631678/+attachment/4758084/+files/AlsaInfo.txt -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1631678 Title: Build in display doesn't show a screen To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1631678/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
