the windows hang after Alt+Tab or/and minimizing

[Vladyslav Kondratenko]

When I want to shift open windows, like files, browsers, etc. they freeze and hang and I can neither minimize nor close that window.

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: xorg 1:7.7+19ubuntu14
ProcVersionSignature: Ubuntu 5.4.0-18.22-generic 5.4.24
Uname: Linux 5.4.0-18-generic x86_64
ApportVersion: 2.20.11-0ubuntu21
Architecture: amd64
BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log'
CompositorRunning: None
CurrentDesktop: ubuntu:GNOME
Date: Sat Mar 28 21:05:02 2020
DistUpgraded: 2020-03-26 22:02:16,208 DEBUG Running PostInstallScript: './xorg_fix_proprietary.py'
DistroCodename: focal
DistroVariant: ubuntu
DkmsStatus:
 virtualbox, 6.1.4, 5.3.0-42-generic, x86_64: installed
 virtualbox, 6.1.4, 5.4.0-18-generic, x86_64: installed
ExtraDebuggingInterest: Yes, if not too technical
GraphicsCard:
 Advanced Micro Devices, Inc. [AMD/ATI] Baffin [Radeon RX 550 640SP / RX 560/560X] [1002:67ff] (rev cf) (prog-if 00 [VGA controller])
   Subsystem: ASUSTeK Computer Inc. Radeon RX 560 [1043:04bc]
InstallationDate: Installed on 2020-02-02 (55 days ago)
InstallationMedia: Ubuntu 19.10 "Eoan Ermine" - Release amd64 (20191017)
MachineType: Gigabyte Technology Co., Ltd. AB350M-Gaming 3
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-18-generic root=UUID=5909a9b7-eb21-439d-a04c-2c42bf662b3c ro quiet splash vt.handoff=7
SourcePackage: xorg
Symptom: display
Title: Xorg freeze
UpgradeStatus: Upgraded to focal on 2020-03-26 (1 days ago)
dmi.bios.date: 05/06/2019
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: F31
dmi.board.asset.tag: Default string
dmi.board.name: AB350M-Gaming 3-CF
dmi.board.vendor: Gigabyte Technology Co., Ltd.
dmi.board.version: x.x
dmi.chassis.asset.tag: Default string
dmi.chassis.type: 3
dmi.chassis.vendor: Default string
dmi.chassis.version: Default string
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrF31:bd05/06/2019:svnGigabyteTechnologyCo.,Ltd.:pnAB350M-Gaming3:pvrDefaultstring:rvnGigabyteTechnologyCo.,Ltd.:rnAB350M-Gaming3-CF:rvrx.x:cvnDefaultstring:ct3:cvrDefaultstring:
dmi.product.family: Default string
dmi.product.name: AB350M-Gaming 3
dmi.product.sku: Default string
dmi.product.version: Default string
dmi.sys.vendor: Gigabyte Technology Co., Ltd.
version.compiz: compiz N/A
version.libdrm2: libdrm2 2.4.100-4
version.libgl1-mesa-dri: libgl1-mesa-dri 20.0.2-1ubuntu1
version.libgl1-mesa-glx: libgl1-mesa-glx 20.0.2-1ubuntu1
version.xserver-xorg-core: xserver-xorg-core 2:1.20.7-2ubuntu2
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:19.1.0-1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20190815-1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.16-1

[Daniel van Vugt (vanvugt)]

This sounds like bug 1868911 or bug 1868896. If you don't think so then please explain in more detail what "shifting" means.

[Vladyslav Kondratenko (omgkanamikun)]

Yes, both bugs that you said, affect me. And in my case, it also freezes when I use Alt+Tab keys in the scope of one workspace or more. Under 'shifting' I mean Alt+Tab and minimize both. I think this is the same bug that you mentioned.