Public bug reported: On a ThinkPad E465 with dual AMD graphics (both integrated AMD Radeon R6 and dedicated Radeon R5 graphics) running Xubuntu 18.04 Bionic Beaver, when opening the lid, lightdm asks for my password, after successfully unlocking the device, the screen goes black with the backlight on for a second, then switches off entirely (nothing is visible at all, regardless of whether there is light incident on the screen or not), but Xfce still works, notifications still sound etc.
When closing the laptop lid again, causing it to go back in to suspend, then opening the lid again, the screen switches back on, briefly (less than a second) displays PCI-related messages on a tty before lightdm appears, and I can continue to Xfce like normal. Switching to tty1 clears the screen and these lines don't appear in dmesg at all. However, the system appears unstable. When the problem occurred for the first time, Firefox froze, apt froze when executed from a terminal window (though apps launched from the Xfce menu worked fine), both requiring 'kill' in Task Manager. Thus, I used Xfce to reboot the machine, but stop jobs ran what appeared to be indefinitely for CUPS and PackageKit, presumably because they too froze. As long as the system didn't suspend during the uptime, the system works like a charm and I've had no other issues or stability complaints. ProblemType: Bug DistroRelease: Ubuntu 18.04 Package: xorg 1:7.7+19ubuntu7 ProcVersionSignature: Ubuntu 4.15.0-23.25-generic 4.15.18 Uname: Linux 4.15.0-23-generic x86_64 ApportVersion: 2.20.9-0ubuntu7.2 Architecture: amd64 BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log' CompositorRunning: None CurrentDesktop: XFCE Date: Thu Jul 5 15:28:03 2018 DistUpgraded: Fresh install DistroCodename: bionic DistroVariant: ubuntu ExtraDebuggingInterest: Yes GraphicsCard: Advanced Micro Devices, Inc. [AMD/ATI] Carrizo [1002:9874] (rev c5) (prog-if 00 [VGA controller]) Subsystem: Lenovo Carrizo [17aa:5116] InstallationDate: Installed on 2018-07-05 (0 days ago) InstallationMedia: Xubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426) MachineType: LENOVO 20EXS00E00 ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-23-generic root=UUID=021ff1ca-dcb1-4671-aa42-06a05e147f88 ro quiet splash vt.handoff=1 SourcePackage: xorg Symptom: display UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 12/20/2017 dmi.bios.vendor: LENOVO dmi.bios.version: R01ET41W (1.21 ) dmi.board.asset.tag: Not Available dmi.board.name: 20EXS00E00 dmi.board.vendor: LENOVO dmi.board.version: SDK0J40697 WIN dmi.chassis.asset.tag: No Asset Information dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: Not Available dmi.modalias: dmi:bvnLENOVO:bvrR01ET41W(1.21):bd12/20/2017:svnLENOVO:pn20EXS00E00:pvrThinkPadE465:rvnLENOVO:rn20EXS00E00:rvrSDK0J40697WIN:cvnLENOVO:ct10:cvrNotAvailable: dmi.product.family: ThinkPad E465 dmi.product.name: 20EXS00E00 dmi.product.version: ThinkPad E465 dmi.sys.vendor: LENOVO version.compiz: compiz N/A version.libdrm2: libdrm2 2.4.91-2 version.libgl1-mesa-dri: libgl1-mesa-dri 18.0.0~rc5-1ubuntu1 version.libgl1-mesa-glx: libgl1-mesa-glx 18.0.0~rc5-1ubuntu1 version.xserver-xorg-core: xserver-xorg-core 2:1.19.6-1ubuntu4 version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:18.0.1-1 version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20171229-1 version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.15-2 ** Affects: xorg (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug bionic 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/1780237 Title: Screen switches off after successful lightdm login from suspend To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1780237/+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