#21 2019-06-18 14:58:35

fnicoli

New Member

From: Brazil

Registered: 2019-01-23

Posts: 3

Re: dual-monitor configuration:desktop wrong size & bad rendering [SOLVED]

Please, don't have the title changed yet. I'm facing the same "wake" issue from your screenshots.

I've used Hydrogen for months and never faced such an issue, but with Helium, whenever I connect a second monitor and ajust it with arandr, every time I move a window on the second monitor it leaves these trails.

I have a Thinkpad T420.

lspci -k | grep -iEA5 'vga|3d|display'

00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller (rev 09)
	Subsystem: Lenovo 2nd Generation Core Processor Family Integrated Graphics Controller
	Kernel driver in use: i915
	Kernel modules: i915
00:16.0 Communication controller: Intel Corporation 6 Series/C200 Series Chipset Family MEI Controller #1 (rev 04)
	Subsystem: Lenovo 6 Series/C200 Series Chipset Family MEI Controller

Restarting openbox doesn't fix the trails, but restarting compton does seem to refresh the screen. Old trails go away but moving the screen around creates more.

It feels like a problem with the compositor. If I do arrange the screens like the picture below on arandr:

I get this interesting effect:

I don't know much about the complex arrangement of screens vs. displays that X does, but it doesn't seem to be a driver problem since the computer renders just fine when the two physical monitors show the same content (even partially).

Last edited by fnicoli (2019-06-18 14:59:50)

damo

....moderator....

Registered: 2015-08-20

Posts: 6,734

Re: dual-monitor configuration:desktop wrong size & bad rendering [SOLVED]

...It feels like a problem with the compositor...).

Have you looked at the compton settings and tried eg different vsync settings?

man compton

Menu -> Help & Resources -> manpages Compositor
Menu -> Preferences -> Compositor -> Edit Compositing Settings

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fnicoli

New Member

From: Brazil

Registered: 2019-01-23

Posts: 3

Re: dual-monitor configuration:desktop wrong size & bad rendering [SOLVED]

I've messed with some of compton's options.

Setting

backend = "glx";

the compositor generates no trails on window movement, but the wallpaper disappears.

Setting

backend = "xr_glx_hybrid";

the compositor generates no trails on window movement, doesn't affect the wallpaper but the movement feels sluggish.

I'm pretty confident this particular issue is related to compton, since when I disable compositing on BL's Menu the trailing effect is gone (and so is my terminal's transparency).

F-104ASA

Member

Registered: 2019-04-19

Posts: 9

Re: dual-monitor configuration:desktop wrong size & bad rendering [SOLVED]

fnicoli,

look at post #3 of this thread for how the "wake" problem disappeared for me. With the modifications I list there I haven't had any problem anymore.