https://bugs.kde.org/show_bug.cgi?id=487403
Bug ID: 487403
Summary: Tearing not working on Hybrid Laptop (Intel/Nvidia)
Classification: Plasma
Product: kwin
Version: 6.0.4
Platform: Arch Linux
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: wayland-generic
Assignee: kwin-bugs-n...@kde.org
Reporter: syed.talha.kha...@gmail.com
Target Milestone: ---
SUMMARY
I am trying to get tearing working on kde6 but I can't get it working, I
thought it might the driver issue. but with the release of nvidia 555 they
implemented tearing protocol support for vulkan. I still can't get it working.
```
❯ cat /etc/environment
#
# This file is parsed by pam_env module
#
# Syntax: simple "KEY=VAL" pairs on separate lines
#
KWIN_DRM_NO_AMS=1
❯ modinfo nvidia | grep ^version
version: 555.42.02
STEPS TO REPRODUCE
1. Set KWIN_DRM_NO_AMS=1
2. Enable Screen Tearing in Full Screen windows
3. Run game on nvidia using offloading (prime-run or nvidia offloading)
4. Make sure game is running in vulkan IMMEDIATE mode (vsync disabled in game)
OBSERVED RESULT
Upon moving the screen really fast, you should be able to see some tearing here
and there or running the game on low fps will cause the most tearing. (Tested
on windows/xorg)
EXPECTED RESULT
Screen tearing with higher/lower fps, instead of forcing vsync and letency
SOFTWARE/OS VERSIONS
❯ fastfetch
.-------------------------: syntist@syntist-pc
.+=========================. ------------------
:++===++==================- :++- OS: CachyOS Linux
x86_64
:*++====+++++=============- .==: Host: Precision 5570
-*+++=====+***++==========: Kernel: Linux
6.9.1-2-cachyos-lto
=*++++========------------: Uptime: 2 hours, 24
mins
=*+++++=====- ... Packages: 1136
(pacman), 39 (flatpak-system), 1 (flatpak-user)
.+*+++++=-===: .=+++=: Shell: zsh 5.9
:++++=====-==: -*****+ Display (SHP1515):
1920x1200 @ 66Hz (as 960x600) [Built-in]
:++========-=. .=+**+. DE: KDE Plasma 6.0.4
.+==========-. . WM: KWin (Wayland)
:+++++++====- .--==-. WM Theme: Breeze
:++==========. :+++++++: Theme: Breeze (Dark)
[QT], Breeze-Dark [GTK2], Breeze [GTK3/4]
.-===========. =*****+*+ Icons: breeze-dark
[QT], breeze-dark [GTK2/3/4]
.-===========: .+*****+: Font: Noto Sans
(10pt) [QT], Noto Sans (10pt) [GTK2/3/4]
-=======++++:::::::::::::::::::::::::-: .---: Cursor: Breeze_Light
(24px)
:======++++====+++******************=. Terminal: konsole
24.2.2
:=====+++==========++++++++++++++*- Terminal Font:
MesloLGS NF (10pt)
.====++==============++++++++++*- CPU: 12th Gen
Intel(R) Core(TM) i7-12800H (20) @ 4.80 GHz
.===+==================+++++++: GPU 1: NVIDIA RTX
A1000 Laptop GPU
.-=======================+++: GPU 2: Intel Iris Xe
Graphics @ 1.40 GHz [Integrated]
.......................... Memory: 6.58 GiB /
15.30 GiB (43%)
Swap: 2.32 GiB /
31.55 GiB (7%)
Disk (/): 174.82 GiB
/ 237.41 GiB (74%) - xfs
Local IP (wlan0):
192.168.1.168/24 *
Battery: 100% [AC
Connected]
Locale: en_US.UTF-8
ADDITIONAL INFORMATION
People using nvidia only card did say tearing is working, even before the new
driver update but for me. It never worked maybe it's cause of hybrid nature of
laptop. I only have 66hz screen and having screen tearing enabled on
windows/xorg make experience much nice latency wise. On windows I have the
smoothes experience even though am having lower fps sometimes, mainly cause of
tearing.
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