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#1 2024-03-30 00:16:50

kinker31
Member
From: Planet Earth (For Now...?)
Registered: 2017-03-26
Posts: 20
Website

XCFE's Window Composting is locked at ~60FPS

Context

I moved over to Arch Linux a few days back, and picked XCFE as my window manager, having heard it was light on both CPU and memory. I also have a dual-monitor setup, one for my main activities (a 1080p monitor from ASUS that runs at 165 HZ), and another one for stuff to check up on, but not actively use (a decade-ish old 1080p monitor from AOC that runs at 60 HZ).

Problem

Whenever I enable Window Composting through the Setting Manager (and/or it's respective settings page), the windows rendered on my main monitor drop down to a somewhat choppy ~60FPS, rather than the ~165FPS I get from having it disabled. This isn't just limited to the windows themselves, programs like GZDoom are also locked to this frame rate, regardless of FPS and VSync settings. Ideally, I would like to be able to keep the transparency capabilities of my windows whilst keeping the silky smooth frame rate of my main monitor. I don't really care too much if it makes the windows on my other monitor look really choppy as a result, I'm not planning on using that monitor for any windows I actually want to actively use.

Additional Info

Since I have an AMD GPU, I use the AMDGPU driver packages as my drivers for the system.
My problem isn't really dire, though it would be pretty nice to be able to play Windowkill at a smooth framerate and keep my desktop as well.
Since I'm still kinda new to Arch, having taken about a week so far to get myself acclimatized to it, I posted this topic in the Newbie's corner. Hopefully this is a good place to put topics like this in.

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#2 2024-03-30 08:10:40

seth
Member
From: Won't reply 2 private help req
Registered: 2012-09-03
Posts: 76,009

Re: XCFE's Window Composting is locked at ~60FPS

Is 60Hz more "choppy" than the uncomposited display?
What framerate does glxgears report?
Please post the output of "xrandr --verbose" and your xorg log, https://wiki.archlinux.org/title/Xorg#General

I somewhat suspect this is more a case of https://wiki.archlinux.org/title/Variab … _on_AMDGPU
Also try https://wiki.archlinux.org/title/Intel_ … on_(VSYNC)

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#3 2024-03-30 14:22:11

spiffeeroo
Member
Registered: 2021-04-23
Posts: 23

Re: XCFE's Window Composting is locked at ~60FPS

Xorg has limitations running multiple monitors with different refresh rates. All the monitors are set to the slowest refresh rate monitor. Since you have an AMDGPU, you can enable AsyncFlipSecondaries.

https://wiki.archlinux.org/title/Variab … figuration
https://www.phoronix.com/news/X.Org-Asy … econdaries

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#4 2024-03-30 15:21:56

seth
Member
From: Won't reply 2 private help req
Registered: 2012-09-03
Posts: 76,009

Re: XCFE's Window Composting is locked at ~60FPS

No, it does not - GLX and GL compositors have issues syncing to multiple outputs and often that's actually a HW limitation.
Es is evidenced by the suggested (and previously linked) - somewhat VRR specific - AMD driver option and the fact that the OP has no issues w/o a compositor.

How to upload text · How to boot w/o GUI · Disable Windows Fast-Start! · Fix your xinitrc

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#5 2024-04-02 04:37:17

kinker31
Member
From: Planet Earth (For Now...?)
Registered: 2017-03-26
Posts: 20
Website

Re: XCFE's Window Composting is locked at ~60FPS

seth wrote:

Is 60Hz more "choppy" than the uncomposited display?
What framerate does glxgears report?
Please post the output of "xrandr --verbose" and your xorg log, https://wiki.archlinux.org/title/Xorg#General

I somewhat suspect this is more a case of https://wiki.archlinux.org/title/Variab … _on_AMDGPU
Also try https://wiki.archlinux.org/title/Intel_ … on_(VSYNC)

Sure; Sorry for the late reply.

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        h: width   640 start  656 end  752 total  800 skew    0 clock  31.47KHz
        v: height  480 start  490 end  492 total  525           clock  59.94Hz
  720x400 (0x7f) 28.320MHz -HSync +VSync
        h: width   720 start  738 end  846 total  900 skew    0 clock  31.47KHz
        v: height  400 start  412 end  414 total  449           clock  70.08Hz

I also enabled both VariableRefresh and syncFlipSecondaries though a new configuration file over at /etc/X11/xorg.conf.d/20-amdgpu.conf, and it technically works, but my primary monitor undergoes screen tearing (the kind where there's green/gray fuzz sprinkled everywhere) when the compositor's on.

EDIT: Just realized you'll probably also want the Xorg log, almost forgot. Here be that too:

Apr 01 23:38:15 [   653.568] (II) AMDGPU(0): Modeline "1024x768"x0.0   75.00  1024 1048 1184 1328  768 771 777 806 -hsync -vsync (56.5 kHz e)
Apr 01 23:38:15 [   653.568] (II) AMDGPU(0): Modeline "1024x768"x0.0   65.00  1024 1048 1184 1344  768 771 777 806 -hsync -vsync (48.4 kHz e)
Apr 01 23:38:15 [   653.568] (II) AMDGPU(0): Modeline "832x624"x0.0   57.28  832 864 928 1152  624 625 628 667 -hsync -vsync (49.7 kHz e)
Apr 01 23:38:15 [   653.568] (II) AMDGPU(0): Modeline "800x600"x0.0   49.50  800 816 896 1056  600 601 604 625 +hsync +vsync (46.9 kHz e)
Apr 01 23:38:15 [   653.568] (II) AMDGPU(0): Modeline "800x600"x0.0   50.00  800 856 976 1040  600 637 643 666 +hsync +vsync (48.1 kHz e)
Apr 01 23:38:15 [   653.568] (II) AMDGPU(0): Modeline "1680x1050"x0.0  119.00  1680 1728 1760 1840  1050 1053 1059 1080 +hsync -vsync (64.7 kHz e)
Apr 01 23:38:15 [   653.568] (II) AMDGPU(0): Modeline "1440x900"x0.0   88.75  1440 1488 1520 1600  900 903 909 926 +hsync -vsync (55.5 kHz e)
Apr 01 23:38:15 [   653.568] (II) AMDGPU(0): Modeline "1280x1024"x0.0  108.00  1280 1328 1440 1688  1024 1025 1028 1066 +hsync +vsync (64.0 kHz e)
Apr 01 23:38:15 [   653.568] (II) AMDGPU(0): Modeline "1280x960"x0.0  108.00  1280 1376 1488 1800  960 961 964 1000 +hsync +vsync (60.0 kHz e)
Apr 01 23:38:15 [   653.568] (II) AMDGPU(0): Modeline "1280x720"x60.0   74.48  1280 1336 1472 1664  720 721 724 746 -hsync +vsync (44.8 kHz e)
Apr 01 23:40:28 [  1282.056] (II) AMDGPU(0): EDID vendor "AOC", prod id 8809
Apr 01 23:40:28 [  1282.056] (II) AMDGPU(0): Using hsync ranges from config file
Apr 01 23:40:28 [  1282.056] (II) AMDGPU(0): Using vrefresh ranges from config file
Apr 01 23:40:28 [  1282.056] (II) AMDGPU(0): Printing DDC gathered Modelines:
Apr 01 23:40:28 [  1282.056] (II) AMDGPU(0): Modeline "1920x1080"x0.0  148.50  1920 2008 2052 2200  1080 1084 1089 1125 +hsync +vsync (67.5 kHz eP)
Apr 01 23:40:28 [  1282.056] (II) AMDGPU(0): Modeline "800x600"x0.0   40.00  800 840 968 1056  600 601 605 628 +hsync +vsync (37.9 kHz e)
Apr 01 23:40:28 [  1282.056] (II) AMDGPU(0): Modeline "800x600"x0.0   36.00  800 824 896 1024  600 601 603 625 +hsync +vsync (35.2 kHz e)
Apr 01 23:40:28 [  1282.056] (II) AMDGPU(0): Modeline "640x480"x0.0   31.50  640 656 720 840  480 481 484 500 -hsync -vsync (37.5 kHz e)
Apr 01 23:40:28 [  1282.056] (II) AMDGPU(0): Modeline "640x480"x0.0   31.50  640 664 704 832  480 489 492 520 -hsync -vsync (37.9 kHz e)
Apr 01 23:40:28 [  1282.056] (II) AMDGPU(0): Modeline "640x480"x0.0   30.24  640 704 768 864  480 483 486 525 -hsync -vsync (35.0 kHz e)
Apr 01 23:40:28 [  1282.056] (II) AMDGPU(0): Modeline "640x480"x0.0   25.18  640 656 752 800  480 490 492 525 -hsync -vsync (31.5 kHz e)
Apr 01 23:40:28 [  1282.056] (II) AMDGPU(0): Modeline "720x400"x0.0   28.32  720 738 846 900  400 412 414 449 -hsync +vsync (31.5 kHz e)
Apr 01 23:40:28 [  1282.056] (II) AMDGPU(0): Modeline "1280x1024"x0.0  135.00  1280 1296 1440 1688  1024 1025 1028 1066 +hsync +vsync (80.0 kHz e)
Apr 01 23:40:28 [  1282.056] (II) AMDGPU(0): Modeline "1024x768"x0.0   78.75  1024 1040 1136 1312  768 769 772 800 +hsync +vsync (60.0 kHz e)
Apr 01 23:40:28 [  1282.056] (II) AMDGPU(0): Modeline "1024x768"x0.0   75.00  1024 1048 1184 1328  768 771 777 806 -hsync -vsync (56.5 kHz e)
Apr 01 23:40:28 [  1282.056] (II) AMDGPU(0): Modeline "1024x768"x0.0   65.00  1024 1048 1184 1344  768 771 777 806 -hsync -vsync (48.4 kHz e)
Apr 01 23:40:28 [  1282.056] (II) AMDGPU(0): Modeline "832x624"x0.0   57.28  832 864 928 1152  624 625 628 667 -hsync -vsync (49.7 kHz e)
Apr 01 23:40:28 [  1282.056] (II) AMDGPU(0): Modeline "800x600"x0.0   49.50  800 816 896 1056  600 601 604 625 +hsync +vsync (46.9 kHz e)
Apr 01 23:40:28 [  1282.056] (II) AMDGPU(0): Modeline "800x600"x0.0   50.00  800 856 976 1040  600 637 643 666 +hsync +vsync (48.1 kHz e)
Apr 01 23:40:28 [  1282.056] (II) AMDGPU(0): Modeline "1680x1050"x0.0  119.00  1680 1728 1760 1840  1050 1053 1059 1080 +hsync -vsync (64.7 kHz e)
Apr 01 23:40:28 [  1282.056] (II) AMDGPU(0): Modeline "1440x900"x0.0   88.75  1440 1488 1520 1600  900 903 909 926 +hsync -vsync (55.5 kHz e)
Apr 01 23:40:28 [  1282.056] (II) AMDGPU(0): Modeline "1280x1024"x0.0  108.00  1280 1328 1440 1688  1024 1025 1028 1066 +hsync +vsync (64.0 kHz e)
Apr 01 23:40:28 [  1282.056] (II) AMDGPU(0): Modeline "1280x960"x0.0  108.00  1280 1376 1488 1800  960 961 964 1000 +hsync +vsync (60.0 kHz e)
Apr 01 23:40:28 [  1282.056] (II) AMDGPU(0): Modeline "1280x720"x60.0   74.48  1280 1336 1472 1664  720 721 724 746 -hsync +vsync (44.8 kHz e)

Last edited by kinker31 (2024-04-02 04:41:38)

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#6 2024-04-02 08:37:30

seth
Member
From: Won't reply 2 private help req
Registered: 2012-09-03
Posts: 76,009

Re: XCFE's Window Composting is locked at ~60FPS

DisplayPort-2 connected primary 1920x1080+0+0 (0x59) normal (normal left inverted right x axis y axis) 598mm x 336mm
        vrr_capable: 1 
                range: (0, 1)
  1920x1080 (0x58) 148.500MHz +HSync +VSync +preferred
        h: width  1920 start 2008 end 2052 total 2200 skew    0 clock  67.50KHz
        v: height 1080 start 1084 end 1089 total 1125           clock  60.00Hz
  1920x1080 (0x59) 401.000MHz +HSync -VSync *current
        h: width  1920 start 1968 end 2000 total 2080 skew    0 clock 192.79KHz
        v: height 1080 start 1083 end 1088 total 1169           clock 164.92Hz
------
HDMI-A-0 connected 1920x1080+1920+0 (0x58) normal (normal left inverted right x axis y axis) 477mm x 268mm
        vrr_capable: 0 
                range: (0, 1)
  1920x1080 (0x58) 148.500MHz +HSync +VSync *current +preferred
        h: width  1920 start 2008 end 2052 total 2200 skew    0 clock  67.50KHz
        v: height 1080 start 1084 end 1089 total 1125           clock  60.00Hz
seth wrote:

That's not your (entire) xorg log and the portion there shows hardly more than the xrandr output and esp. not any kind of (VRR) options applied to the driver (though you're using AMDGPU)

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