but without results
System:
Host: Linux-1 Kernel: 5.4.0-67-generic x86_64 bits: 64 Desktop: Cinnamon 4.8.6 Distro: Linux Mint 20.1 Ulyssa
Machine:
Type: Desktop System: MSI product: MS-7885 v: 1.0 serial: N/A
Mobo: MSI model: X99S SLI PLUS (MS-7885) v: 1.0 serial: N/A UEFI: American Megatrends v: 1.E0 date: 06/15/2018
CPU:
Topology: 6-Core model: Intel Core i7-5820K bits: 64 type: MT MCP L2 cache: 15.0 MiB
Speed: 1201 MHz min/max: 1200/3600 MHz Core speeds (MHz): 1: 1201 2: 1201 3: 1201 4: 1200 5: 1202 6: 1200 7: 1200
8: 1201 9: 1201 10: 1203 11: 1201 12: 1200
Graphics:
Device-1: NVIDIA GM204 [GeForce GTX 970] driver: nvidia v: 460.39
Display: server: X.Org 1.20.9 driver: nvidia resolution: 3840x2160~60Hz
OpenGL: renderer: GeForce GTX 970/PCIe/SSE2 v: 4.6.0 NVIDIA 460.39
Details:
Flickering started when I had to replace my monitor (1920x1080 TV) by a new one (3840x2160 TV).
Fortunately it only happens, on average, three or four times a day. When it happens it usually flickers 2 or 3 times in a row.
It happened with Cinnamon 19.3 and it keeps happening, now, with Cinnamon 20.1. Here are some things I have noticed:
- Flickers have never been observed in full screen mode (movies, pictures).
- TV doesn't switch off: TV settings' dialog stable while PC screen flickers.
- Doesn't seem to be a band-width problem: Happens in 3840x2160_30 & 3840x2160_60 (more in 3840x2160_30); New 8k HDMI cables.
- Flickers not registered in /var/log/Xorg.0.log: File has same length (and time-stamp) before an after a flicker.
- Flickering happens with any setting in 'Settings/General/Compositor Options/VSync method'.
- '$HOME/.xsession-errors' changes every time there is a flicker. Last line is always something like:
'Cinnamon warning: Buggy client sent a _NET_ACTIVE_WINDOW message with a timestamp of 0 for 0x8a00085 (*.xsession)'
Copies of '.xsession-errors', just after a flicker:
https://github.com/linuxmint/cinnamon/f ... errors.log
https://github.com/linuxmint/cinnamon/f ... rrors2.log
https://github.com/linuxmint/cinnamon/f ... rrors3.log