Hi, I'm seeing this error as well. The last frame shown while logging in freezes on the second monitor and only the cursor updates.
I have enabled iGPU Multi-Monitor for my ASUS motherboard, which enabled me to connect one monitor through the motherboard and one through my GPU - the one connected to the GPU is the one that freezes. This has previously worked with Ubuntu 18.04. -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to mutter in Ubuntu. https://bugs.launchpad.net/bugs/1792822 Title: Dual monitor not working in 18.04(.1) on a dual-radeon-GPU system Status in mutter package in Ubuntu: Expired Bug description: Dual monitor setup works fine in 16.04 LTS. Not anymore in 18.04(.1). This renders 18.04 useless. Till this is solved will have to stick with 16.04. i.e. this is a pretty critical bug! After a fresh install from DVD first got a freeze on login screen (live CD will run ubuntu though!). This could be solved by switching to lightdm display manager. (Boo! for GDM that cannot even show a login screen without freezing the system) But one issue remains: the dual monitor setup will not work in 18.04. I can see the mouse move to the second monitor. I can drag windows there (and lose sight of them). I can see the mouse cursor change to click a link. But otherwise there is a completely black screen, or dots / colored fields, but nothing even resembling a program. MB: Gigabyte GA-A75M-UD2H Monitor that works fine: ASUS on Radeon HD 6550D monitor that only shows mouse cursor: benq on Radeon HD 4870 (onboard on the gigabyte motherboard) Note: dual monitor setup did not work with other upgrades after 16.04. I hoped this would be solved with the next LTS update. Not so, to great disappointment! Ubuntu really fails if with new major updates it makes systems fall down. This kind of thing should work FLAWLESS out of the box! How would anyone move to Ubuntu when this kind of thing does not work? Windows is a drama, but at least it has the mere basics working! ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: xorg 1:7.7+13ubuntu3.1 ProcVersionSignature: Ubuntu 4.4.0-135.161-generic 4.4.140 Uname: Linux 4.4.0-135-generic x86_64 .tmp.unity_support_test.0: ApportVersion: 2.20.1-0ubuntu2.18 Architecture: amd64 CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins' CompositorRunning: compiz CompositorUnredirectDriverBlacklist: '(nouveau|Intel).*Mesa 8.0' CompositorUnredirectFSW: true CurrentDesktop: Unity Date: Sun Sep 16 23:09:31 2018 DistUpgraded: Fresh install DistroCodename: xenial DistroVariant: ubuntu DkmsStatus: virtualbox, 5.0.40, 4.4.0-133-generic, x86_64: installed virtualbox, 5.0.40, 4.4.0-134-generic, x86_64: installed virtualbox, 5.0.40, 4.4.0-135-generic, x86_64: installed GraphicsCard: Advanced Micro Devices, Inc. [AMD/ATI] BeaverCreek [Radeon HD 6550D] [1002:9640] (prog-if 00 [VGA controller]) Subsystem: Gigabyte Technology Co., Ltd BeaverCreek [Radeon HD 6550D] [1458:d000] Advanced Micro Devices, Inc. [AMD/ATI] RV770 [Radeon HD 4870] [1002:9440] (prog-if 00 [VGA controller]) Subsystem: PC Partner Limited / Sapphire Technology RV770 [Radeon HD 4870] [174b:0851] InstallationDate: Installed on 2016-10-02 (714 days ago) InstallationMedia: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719) MachineType: Gigabyte Technology Co., Ltd. GA-A75M-UD2H ProcEnviron: LANGUAGE=nl_NL PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=nl_NL.UTF-8 SHELL=/bin/bash ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-135-generic root=UUID=a5b3b47d-aa17-4b49-ba9a-eeaefc2556d6 ro quiet splash SourcePackage: xorg Symptom: display UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 11/17/2011 dmi.bios.vendor: Award Software International, Inc. dmi.bios.version: F6c dmi.board.name: GA-A75M-UD2H dmi.board.vendor: Gigabyte Technology Co., Ltd. dmi.board.version: x.x dmi.chassis.type: 3 dmi.chassis.vendor: Gigabyte Technology Co., Ltd. dmi.modalias: dmi:bvnAwardSoftwareInternational,Inc.:bvrF6c:bd11/17/2011:svnGigabyteTechnologyCo.,Ltd.:pnGA-A75M-UD2H:pvr:rvnGigabyteTechnologyCo.,Ltd.:rnGA-A75M-UD2H:rvrx.x:cvnGigabyteTechnologyCo.,Ltd.:ct3:cvr: dmi.product.name: GA-A75M-UD2H dmi.sys.vendor: Gigabyte Technology Co., Ltd. version.compiz: compiz 1:0.9.12.3+16.04.20180221-0ubuntu1 version.ia32-libs: ia32-libs N/A version.libdrm2: libdrm2 2.4.91-2~16.04.1 version.libgl1-mesa-dri: libgl1-mesa-dri 18.0.5-0ubuntu0~16.04.1 version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A version.libgl1-mesa-glx: libgl1-mesa-glx 18.0.5-0ubuntu0~16.04.1 version.xserver-xorg-core: xserver-xorg-core 2:1.18.4-0ubuntu0.8 version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.10.1-1ubuntu2 version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.7.0-1 version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20160325-1ubuntu1.2 version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.12-1build2 xserver.bootTime: Sun Sep 16 19:34:47 2018 xserver.configfile: default xserver.errors: RADEON(G0): [XvMC] Failed to initialize extension. xserver.logfile: /var/log/Xorg.0.log xserver.version: 2:1.18.4-0ubuntu0.8 xserver.video_driver: radeon To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/mutter/+bug/1792822/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
