HP ZBook 15 G6 display key (Fn+F1) autorepeats too fast to be usable

[Frank Blah]

Steps to reproduce:
1. Press the functional button for switching output to displays (joint, mirror, bulit-in, external) 2. The dialog is invoked

What is expected:
I should be able to select the desired option and confirm it

What happened instead:
While the functional button for invoking the dialog is pressed, it iterates extremely fast over the options. I cannot control it. After releasing the key, the currently selected option is confirmed, which is effectively random.

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: xorg 1:7.7+19ubuntu14
ProcVersionSignature: Ubuntu 5.4.0-29.33-generic 5.4.30
Uname: Linux 5.4.0-29-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
.proc.driver.nvidia.gpus.0000.01.00.0: Error: [Errno 21] Is a directory: '/proc/driver/nvidia/gpus/0000:01:00.0'
.proc.driver.nvidia.registry: Binary: ""
.proc.driver.nvidia.suspend: suspend hibernate resume
.proc.driver.nvidia.suspend_depth: default modeset uvm
.proc.driver.nvidia.version:
 NVRM version: NVIDIA UNIX x86_64 Kernel Module 440.64 Fri Feb 21 01:17:26 UTC 2020
 GCC version:
ApportVersion: 2.20.11-0ubuntu27
Architecture: amd64
BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log'
CasperMD5CheckResult: skip
CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
CompositorRunning: None
CurrentDesktop: ubuntu:GNOME
Date: Fri May 15 01:28:30 2020
DistUpgraded: Fresh install
DistroCodename: focal
DistroVariant: ubuntu
ExtraDebuggingInterest: Yes
GraphicsCard:
 NVIDIA Corporation TU117GLM [Quadro T2000 Mobile / Max-Q] [10de:1fb8] (rev a1) (prog-if 00 [VGA controller])
   Subsystem: Hewlett-Packard Company TU117GLM [Quadro T2000 Mobile / Max-Q] [103c:8611]
InstallationDate: Installed on 2020-05-11 (3 days ago)
InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423)
MachineType: HP HP ZBook 15 G6
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-29-generic root=UUID=9895584a-6648-494d-9d91-e64ba192dd95 ro quiet splash vt.handoff=7
SourcePackage: xorg
Symptom: display
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 09/25/2019
dmi.bios.vendor: HP
dmi.bios.version: R92 Ver. 01.02.01
dmi.board.name: 860F
dmi.board.vendor: HP
dmi.board.version: KBC Version 65.23.00
dmi.chassis.type: 10
dmi.chassis.vendor: HP
dmi.modalias: dmi:bvnHP:bvrR92Ver.01.02.01:bd09/25/2019:svnHP:pnHPZBook15G6:pvr:rvnHP:rn860F:rvrKBCVersion65.23.00:cvnHP:ct10:cvr:
dmi.product.family: 103C_5336AN HP ZBook 15
dmi.product.name: HP ZBook 15 G6
dmi.product.sku: 6CJ09AV
dmi.sys.vendor: HP
version.compiz: compiz N/A
version.libdrm2: libdrm2 2.4.101-2
version.libgl1-mesa-dri: libgl1-mesa-dri 20.0.4-2ubuntu1
version.libgl1-mesa-glx: libgl1-mesa-glx 20.0.4-2ubuntu1
version.nvidia-graphics-drivers: nvidia-graphics-drivers-* N/A
version.xserver-xorg-core: xserver-xorg-core 2:1.20.8-2ubuntu2
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+git20200226-1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.16-1

[Daniel van Vugt (vanvugt)]

Thanks for the bug report.

I didn't know about that hotkey. On my system it is Super+P and only works when a secondary monitor is plugged in. Are you using Super+P or some function key unique to your model of laptop?

[Frank Blah (sitnarf)]

The Super+P shortcut works! In the report, I used a dedicated fn key (situated on F1). With Super+P, the selection is confirmed when Super is released. That probably causes the bug when using the single fn key.

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This change was made by a bot.

[Kai-Heng Feng (kaihengfeng)]

Do you mean long press or a short press? I think this is expected behavior for long press.

[Frank Blah (sitnarf)]

a) When I do a short press, then immediately after a release, the next option is selected (the dialog does not have time to appear even).
b) When I do a long press, then the options start to circle very quickly until I release the key (see the screencast)

I think the bug is caused by this: When you do Super+K, you hold Super and press K repeatedly to switch the options. After you release the Super key, the option is confirmed. When you use the fn key, there is just one key, so after releasing, it immediately selects the option.

[Frank Blah (sitnarf)]

I would add that "severity" of this issue lies in the confusion. I believed this feature is actually broken, since the fn key works in Plasma and there wasn't any indication that there is another shortcut.

[Eric Gourgoulhon (egourgoulhon)]

Same issue on Dell Latitude 5500 when hitting the F8 key for choosing the display.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.