Ubuntu 26.04 Huge speed difference between GNOME and Cosmic session

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1

Ubuntu Version: 26.04
Desktop Environment: GNOME and Cosmic

Problem Description:
I don’t know if glxgears is a valid indicator but in Ubuntu 26.04 I see a huge difference in speed between the GNOME session and the Cosmic session. Same PC different partitions.
Do I have to open a bug?

Relevant System Information:

corrado@corrado-n4-resolute:~$ inxi -SCGc
System:
  Host: corrado-n4-resolute Kernel: 7.0.0-15-generic arch: x86_64 bits: 64
  Desktop: GNOME v: 50.1 Distro: Ubuntu 26.04 (Resolute Raccoon)
CPU:
  Info: 6-core model: 11th Gen Intel Core i5-11400 bits: 64 type: MT MCP
    cache: L2: 3 MiB
  Speed (MHz): avg: 1000 min/max: 800/4400 cores: 1: 1000 2: 1000 3: 1000
    4: 1000 5: 1000 6: 1000 7: 1000 8: 1000 9: 1000 10: 1000 11: 1000 12: 1000
Graphics:
  Device-1: Intel RocketLake-S GT1 [UHD Graphics 730] driver: i915 v: kernel
  Device-2: Logitech HD Webcam C615 driver: snd-usb-audio,uvcvideo type: USB
  Display: wayland server: X.Org v: 24.1.10 with: Xwayland v: 24.1.10
    compositor: gnome-shell driver: dri: iris gpu: i915
    resolution: 1920x1080~60Hz
  API: EGL v: 1.5 drivers: iris,swrast
    platforms: gbm,wayland,x11,surfaceless,device
  API: OpenGL v: 4.6 compat-v: 4.5 vendor: intel mesa v: 26.0.3-1ubuntu1
    renderer: Mesa Intel Graphics (RKL GT1)
  Info: Tools: api: eglinfo,glxinfo x11: xdriinfo, xdpyinfo, xprop, xrandr
corrado@corrado-n4-resolute:~$ 



corrado@corrado-n4-resolute:~$ vblank_mode=0 glxgears
ATTENTION: default value of option vblank_mode overridden by environment.
47617 frames in 5.0 seconds = 9523.384 FPS
47934 frames in 5.0 seconds = 9586.789 FPS
47988 frames in 5.0 seconds = 9597.600 FPS
47918 frames in 5.0 seconds = 9583.456 FPS
48072 frames in 5.0 seconds = 9614.319 FPS
47763 frames in 5.0 seconds = 9552.445 FPS

corrado@corrado-a4-rr-cosmic:~$ vblank_mode=0 glxgears
ATTENTION: default value of option vblank_mode overridden by environment.
134259 frames in 5.0 seconds = 26851.727 FPS
135046 frames in 5.0 seconds = 27009.174 FPS
134021 frames in 5.0 seconds = 26804.123 FPS
121361 frames in 5.0 seconds = 24272.033 FPS
126606 frames in 5.0 seconds = 25321.186 FPS
132850 frames in 5.0 seconds = 26569.969 FPS
1 Like
2

can you fix inxi to show many lines?

1 Like
3

Debian Forky, Ubuntu Noble and Xubuntu show similar performance but Noble is much better than Resolute

corrado@corrado-n2-noble:~$ vblank_mode=0 glxgears
ATTENTION: default value of option vblank_mode overridden by environment.
65166 frames in 5.0 seconds = 13033.138 FPS
65297 frames in 5.0 seconds = 13059.329 FPS
65391 frames in 5.0 seconds = 13078.040 FPS

corrado@corrado-b4-xubuntu:~$ vblank_mode=0 glxgears
ATTENTION: default value of option vblank_mode overridden by environment.
55207 frames in 5.0 seconds = 11041.313 FPS
55742 frames in 5.0 seconds = 11148.284 FPS
55570 frames in 5.0 seconds = 11113.953 FPS

corrado@corrado-a6-debian:~$ vblank_mode=0 glxgears
ATTENTION: default value of option vblank_mode overridden by environment.
48235 frames in 5.0 seconds = 9646.969 FPS
46988 frames in 5.0 seconds = 9397.579 FPS
47960 frames in 5.0 seconds = 9591.841 FPS
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