[Ubuntu-x-swat] [Bug 1802573] Re: Thinkpad x220 - Unable to use 2560x1440 external display connected via DisplayPort due flashing black screen
I can't even get into the login screen when the DisplayPort device is attached. But I disconnected that, got to gdm login via the VGA device, then switched to Ubuntu on Wayland. Ubuntu on Wayland works fine for me generally, but I get the same behavior when connecting the DisplayPort device after logging in. I've included a video of the behavior here: https://photos.app.goo.gl/aJSx5stMMg7QZULH6 -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xorg-server in Ubuntu. https://bugs.launchpad.net/bugs/1802573 Title: Thinkpad x220 - Unable to use 2560x1440 external display connected via DisplayPort due flashing black screen To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1802573/+subscriptions ___ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp
[Ubuntu-x-swat] [Bug 1802573] Re: Thinkpad x220 - Unable to use 2560x1440 external display connected via DisplayPort due flashing black screen
I'm having trouble finding a way to switch Ubuntu 18.10 to Wayland. I have Xwayland installed but don't see a way to switch the session. I did enable it in gdm3 custom.conf but it doesn't seem to be running. Can you point me to some directions? -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xorg-server in Ubuntu. https://bugs.launchpad.net/bugs/1802573 Title: Thinkpad x220 - Unable to use 2560x1440 external display connected via DisplayPort due flashing black screen To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1802573/+subscriptions ___ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp
[Ubuntu-x-swat] [Bug 1802573] [NEW] Thinkpad x220 - Unable to use 2560x1440 external display connected via DisplayPort due flashing black screen
Public bug reported: I have a fresh install of 18.10 on an old Thinkpad x220. Everything works fine with the internal display or an external Dell G2410 (1920x1080) connected via VGA. But when I try to switch to an external BenQ PD2710QC (2560x1440) I only see the screen for a few seconds at a time and then it flashes to black. This happens consistently for minutes --it never "settles down". I've tried the default configuration as well as copying xorg.conf from /usr/share/doc/xserver-xorg-video-intel into /etc/x11. I've tried both xorg configurations with nomodeset in the bootloader and without. I have not been able to find any configuration that allows this external DisplayPort display to work. The same hardware combination works fine in Windows 10. ProblemType: Bug DistroRelease: Ubuntu 18.10 Package: xorg 1:7.7+19ubuntu8 ProcVersionSignature: Ubuntu 4.18.0-10.11-generic 4.18.12 Uname: Linux 4.18.0-10-generic x86_64 ApportVersion: 2.20.10-0ubuntu13 Architecture: amd64 Date: Fri Nov 9 13:10:59 2018 DistUpgraded: Fresh install DistroCodename: cosmic DistroVariant: ubuntu ExtraDebuggingInterest: Yes GraphicsCard: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller [8086:0126] (rev 09) (prog-if 00 [VGA controller]) Subsystem: Lenovo 2nd Generation Core Processor Family Integrated Graphics Controller [17aa:21da] InstallationDate: Installed on 2018-11-09 (0 days ago) InstallationMedia: Ubuntu 18.10 "Cosmic Cuttlefish" - Release amd64 (20181017.3) MachineType: LENOVO 42872WU ProcEnviron: TERM=xterm PATH=(custom, no user) XDG_RUNTIME_DIR= LANG=en_US.UTF-8 SHELL=/bin/bash ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.18.0-10-generic root=UUID=cd4f21be-48dd-48e7-b289-a59a32bd0be3 ro quiet splash nomodeset vt.handoff=1 SourcePackage: xorg Symptom: display UpgradeStatus: No upgrade log present (probably fresh install) XorgConf: Section "Device" Identifier "Intel" Driver "intel" # Option "AccelMethod" "uxa" EndSection dmi.bios.date: 06/21/2018 dmi.bios.vendor: LENOVO dmi.bios.version: 8DET76WW (1.46 ) dmi.board.asset.tag: Not Available dmi.board.name: 42872WU dmi.board.vendor: LENOVO dmi.board.version: Not Available dmi.chassis.asset.tag: No Asset Information dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: Not Available dmi.modalias: dmi:bvnLENOVO:bvr8DET76WW(1.46):bd06/21/2018:svnLENOVO:pn42872WU:pvrThinkPadX220:rvnLENOVO:rn42872WU:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable: dmi.product.family: ThinkPad X220 dmi.product.name: 42872WU dmi.product.version: ThinkPad X220 dmi.sys.vendor: LENOVO version.compiz: compiz 1:0.9.13.1+18.10.20180930-0ubuntu1 version.libdrm2: libdrm2 2.4.95-1 version.libgl1-mesa-dri: libgl1-mesa-dri 18.2.2-0ubuntu1 version.libgl1-mesa-glx: libgl1-mesa-glx N/A version.xserver-xorg-core: xserver-xorg-core 2:1.20.1-3ubuntu2.1 version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:18.1.0-1 version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20171229-1ubuntu1 version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.15-3 ** Affects: xorg (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug cosmic ubuntu -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xorg in Ubuntu. https://bugs.launchpad.net/bugs/1802573 Title: Thinkpad x220 - Unable to use 2560x1440 external display connected via DisplayPort due flashing black screen To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1802573/+subscriptions ___ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp
