https://bugs.kde.org/show_bug.cgi?id=423230
--- Comment #4 from Marcus Seyfarth <m.seyfa...@gmail.com> ---
As I mentioned, 144 Hz is set in systemsettings, I am on 5.21.4 but I have also
seen it on KDE-git as of last week on Manjaro. My HP monitor is set to Freesync
mode and connected via Display Port, I've created a file for X to enable it
(and DRI3) accordingly. Once I do my workaround, I get 144 Hz without touching
anything, hence I suspect that Kwin has issues on startup to set the refresh
rate correctly.
The rest of my system:
System: Host: klx99 Kernel: 5.12.4-xanmod1-llvm-2 x86_64 bits: 64 Console:
tty 1 Distro: Ubuntu 21.04 (Hirsute Hippo)
Machine: Type: Desktop System: LENOVO product: GAMING TF v: N/A serial:
A3X99XXXXXXXXXXXX
Mobo: Lenovo model: X99-TF Gaming v: G368J V1.1 serial:
A3X99XXXXXXXXXXXX UEFI: American Megatrends v: CX99DE26
date: 10/10/2020
CPU: Info: 12-Core model: Intel Xeon E5-2678 v3 bits: 64 type: MT MCP L2
cache: 30 MiB
Speed: 2414 MHz min/max: 1200/3300 MHz Core speeds (MHz): 1: 2414 2:
2127 3: 3301 4: 2273 5: 1735 6: 1201 7: 1618
8: 3302 9: 2636 10: 2858 11: 2355 12: 1843 13: 1383 14: 1200 15:
1200 16: 1200 17: 1201 18: 1200 19: 1447 20: 1200
21: 1492 22: 1200 23: 1200 24: 1811
Graphics: Device-1: Advanced Micro Devices [AMD/ATI] Vega 10 XL/XT [Radeon RX
Vega 56/64] driver: amdgpu v: kernel
Display: server: X.Org 1.20.11 driver: loaded: amdgpu,ati unloaded:
fbdev,modesetting,vesa resolution: 1920x1080
OpenGL: renderer: Radeon RX Vega (VEGA10 DRM 3.40.0
5.12.4-xanmod1-llvm-2 LLVM 12.0.0)
v: 4.6 Mesa 21.2.0-devel (git-bcdebf4ff8)
Audio: Device-1: Intel C610/X99 series HD Audio driver: snd_hda_intel
Device-2: Advanced Micro Devices [AMD/ATI] Vega 10 HDMI Audio
[Radeon Vega 56/64] driver: snd_hda_intel
Sound Server: ALSA v: k5.12.4-xanmod1-llvm-2
Network: Device-1: Intel I350 Gigabit Network driver: igb
IF: ens1f0 state: down mac: a0:36:9f:a3:72:44
Device-2: Intel I350 Gigabit Network driver: igb
IF: ens1f1 state: up speed: 1000 Mbps duplex: full mac:
a0:36:9f:09:3f:67
Device-3: Realtek RTL8111/8168/8411 PCI Express Gigabit Ethernet
driver: r8169
IF: enp8s0 state: down mac: 00:e0:4c:68:02:1c
RAID: Hardware-1: Intel C610/X99 series sSATA Controller [RAID mode]
driver: ahci
Drives: Local Storage: total: 5.03 TiB used: 57.81 GiB (1.1%)
ID-1: /dev/nvme0n1 vendor: Silicon Power model: SPCC M.2 PCIe SSD
size: 953.87 GiB
ID-2: /dev/sda vendor: Seagate model: ST2000DX001-1CM164 size: 1.82
TiB
ID-3: /dev/sdb vendor: Seagate model: ST2000DX001-1CM164 size: 1.82
TiB
ID-4: /dev/sdc vendor: Samsung model: SSD 860 EVO 500GB size: 465.76
GiB
Partition: ID-1: / size: 3.58 TiB used: 57.8 GiB (1.6%) fs: ext4 dev: /dev/dm-2
ID-2: /boot/efi size: 511 MiB used: 5.2 MiB (1.0%) fs: vfat dev:
/dev/dm-1
Swap: ID-1: swap-1 type: file size: 2 GiB used: 0 KiB (0.0%) file:
/swapfile
Sensors: System Temperatures: cpu: 32.0 C mobo: N/A gpu: amdgpu temp: 64.0 C
Fan Speeds (RPM): N/A gpu: amdgpu fan: 97
Info: Processes: 410 Uptime: 50m Memory: 31.21 GiB used: 2.05 GiB (6.6%)
Shell: Bash inxi: 3.3.01
A second easy way to reproduce is to visit the UFO VSync Tester:
https://www.testufo.com/animation-time-graph#scale=10&ppf=2&measure=animation&busywait=0&fullscreen=1
On EVERY startup, I get heavy fluctuations between 8ms and minus 6ms, once I do
my workaround, the line is super smooth for the rest of the session. As
mentioned in my first post these fluctuations result in heavy frame drops in
Youtube and WebGL applications like the linked Aquarium demo which are also
stuck at around 64 fps. Again, once I enter a game and quit it back to desktop,
everything is fine. Also if I use KwinFT on Manjaro, I can no longer see this
issue (hence ruling out other oddities with the Kernel or hardware which could
cause this).
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