Disappearing cursor on multi-GPU setup #3030

IntinteDAO · 2021-06-27T21:05:29Z

Sway Version:
- sway version 1.6-5cdce42d (Jun 26 2021, branch 'master')
Debug Log:
https://0bin.net/paste/up-swxj-#PJPVTysHFaMxP3QLzyxcJ-EN4sFoSob1FtZtbqIm2FW
Configuration File:
https://0bin.net/paste/eUn83bT7#nkNcFBESXx5ruLKva2F+zyzxJuhy5rw6Bu22csinUPT
Description:
The error is probably due to disabling one monitor (using wdisplays). This causes problems with the cursor not displaying in Sway. Various actions turn it off and on. For example hover the mouse over wofi makes the cursor disappear and running wdisplays makes it come back.

The mouse is on button (it changed a color, but invisible)

Here the mouse is near the menu, but also invisible)

emersion · 2021-06-28T18:53:15Z

The debug logs look incomplete and only includes errors. Please submit a complete debug log.

IntinteDAO · 2021-06-29T08:25:22Z

Updated
https://0bin.net/paste/up-swxj-#PJPVTysHFaMxP3QLzyxcJ-EN4sFoSob1FtZtbqIm2FW

emersion · 2021-06-29T08:28:40Z

00:00:00.671 [DEBUG] [wlr] [render/gbm_allocator.c:197] Created GBM allocator with backend drm
00:00:00.671 [DEBUG] [wlr] [render/gbm_allocator.c:200] Using DRM node /dev/dri/card1
00:00:00.671 [DEBUG] [wlr] [render/swapchain.c:105] Allocating new swapchain buffer
00:00:00.672 [DEBUG] [wlr] [render/gbm_allocator.c:128] Allocated 256x256 GBM buffer (format 0x34325241, modifier 0x200000000000901)
00:00:00.672 [DEBUG] [wlr] [render/gles2/renderer.c:138] Created GL FBO for buffer 256x256
00:00:00.672 [ERROR] [wlr] [EGL] command: eglCreateImageKHR, error: EGL_BAD_ALLOC (0x3003), message: "dri2_create_image_khr_texture"
00:00:00.672 [ERROR] [wlr] [render/egl.c:588] eglCreateImageKHR failed
00:00:00.672 [ERROR] [wlr] [render/gles2/texture.c:337] Failed to create EGL image from DMA-BUF
00:00:00.672 [DEBUG] [wlr] [types/wlr_output.c:1393] Falling back to software cursor on output 'HDMI-A-1'

AToMiXhawK · 2021-06-30T03:45:02Z

Same problem here after updating to version 1.6.1 on archlinux (wlroots 0.14).

emersion · 2021-07-05T09:09:12Z

Can you try #3021?

IntinteDAO · 2021-07-05T21:29:57Z

Now on start sway I have no cursor, wdisplays restores it, but it disappears if I start wofi (so nothing has changed here).

New log:
https://0bin.net/paste/cCOY5Ep0#Nc-ZNl06MGzVi542bay5isg4bZrXhM5BUmE1hWmxPhD

emersion · 2021-07-05T21:33:23Z

OK. The errors are the same.

Do you have anything in dmesg, btw?

emersion · 2021-07-05T21:33:45Z

Does WLR_DRM_NO_MODIFIERS=1 help by any chance?

IntinteDAO · 2021-07-05T21:42:24Z

sway[1791]: segfault at 0 ip 00007f00b3f83b83 sp 00007ffcff96c7e8 error 6 in libwayland-server.so.0.1.0[7f00b3f7d000+8000]
sway[4298]: segfault at 75 ip 00007fa204289b83 sp 00007ffe84789ac8 error 6 in libwayland-server.so.0.1.0[7fa204283000+8000]
Partially yes. On startup there is no cursor - (regression), but once I start wdisplays the cursor returns and does not disappear, so success

nwg-piotr · 2021-07-05T23:52:47Z

~~Same here, with and without WLR_DRM_NO_MODIFIERS=1.~~

wdisplays (didn't even know it existed) makes cursor appear on external displays, but after I close it, and e.g. open/close Firefox, cursor disappears again. Setting WLR_DRM_NO_MODIFIERS=1 changes nothing.

emersion · 2021-07-06T09:10:08Z

@AToMiXhawK, you have a different bug, fixed in wlroots master.

emersion · 2021-07-08T08:57:06Z

Does this wlroots patch help by any chance? https://l.sr.ht/-ZAc.txt

Some buffers need to be copied across GPUs. Such buffers need to be allocated with a format and modifier suitable for both the source and the destination. When explicit modifiers aren't supported, we were forcing the buffers to be allocated with a linear layout, because implicit modifiers aren't portable across GPUs. All is well with this case. When explicit modifiers are supported, we were advertising the whole list of destination modifiers, in the hope that the source might have some in common and might be able to allocate a buffer with a more optimized layout. This works well if the source supports explicit modifiers. However, if the source doesn't, then wlr_drm_format_intersect will fallback to implicit modifiers, and everything goes boom: the source uses a GPU-specific tiling and the destination interprets it as linear. To avoid this, just force linear unconditionally. We'll be able to revert this once we have a good way to indicate that an implicit modifier isn't supported in wlr_drm_format_set, see [1]. [1]: swaywm#2815 Closes: swaywm#3030

IntinteDAO · 2021-07-08T10:28:48Z

Does this wlroots patch help by any chance? https://l.sr.ht/-ZAc.txt

For me - works great! But it's nice to check @nwg-piotr also

nwg-piotr · 2021-07-08T11:05:04Z

check @nwg-piotr also

I'll check as soon as I'm back home.

nwg-piotr · 2021-07-08T15:05:20Z

Works for me, too. Excellent news!

emersion · 2021-07-08T15:06:13Z

Thanks for testing!

Some buffers need to be copied across GPUs. Such buffers need to be allocated with a format and modifier suitable for both the source and the destination. When explicit modifiers aren't supported, we were forcing the buffers to be allocated with a linear layout, because implicit modifiers aren't portable across GPUs. All is well with this case. When explicit modifiers are supported, we were advertising the whole list of destination modifiers, in the hope that the source might have some in common and might be able to allocate a buffer with a more optimized layout. This works well if the source supports explicit modifiers. However, if the source doesn't, then wlr_drm_format_intersect will fallback to implicit modifiers, and everything goes boom: the source uses a GPU-specific tiling and the destination interprets it as linear. To avoid this, just force linear unconditionally. We'll be able to revert this once we have a good way to indicate that an implicit modifier isn't supported in wlr_drm_format_set, see [1]. [1]: #2815 Closes: #3030

Some buffers need to be copied across GPUs. Such buffers need to be allocated with a format and modifier suitable for both the source and the destination. When explicit modifiers aren't supported, we were forcing the buffers to be allocated with a linear layout, because implicit modifiers aren't portable across GPUs. All is well with this case. When explicit modifiers are supported, we were advertising the whole list of destination modifiers, in the hope that the source might have some in common and might be able to allocate a buffer with a more optimized layout. This works well if the source supports explicit modifiers. However, if the source doesn't, then wlr_drm_format_intersect will fallback to implicit modifiers, and everything goes boom: the source uses a GPU-specific tiling and the destination interprets it as linear. To avoid this, just force linear unconditionally. We'll be able to revert this once we have a good way to indicate that an implicit modifier isn't supported in wlr_drm_format_set, see [1]. [1]: #2815 Closes: #3030 (cherry picked from commit d71ed63)

nwg-piotr · 2021-07-08T22:36:08Z

Just for curiosity: average CPU load measured on idle in the same conditions. Ryzen 7 + hybrid AMD graphics w/ 2 external displays.

version	CPU load	MEM usage
0.12.0	1.88%	490 MiB
0.13.0	3.50%	435 MiB
0.14.0	3.15%	433 MiB
0.14.1	2.82%	435 MiB

emersion changed the title ~~Disappearing cursor~~ Disappearing cursor on multi-GPU setup Jun 29, 2021

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emersion transferred this issue from swaywm/sway Jul 7, 2021

emersion added bug backend/drm labels Jul 7, 2021

emersion mentioned this issue Jul 8, 2021

wlroots 0.14.0 mouse pointer invisible on external displays with multi-GPU #2995

Closed

emersion mentioned this issue Jul 8, 2021

backend/drm: force linear layout for multi-GPU buffers #3033

Merged

emersion added this to the 0.14.1 milestone Jul 8, 2021

emersion closed this as completed in #3033 Jul 8, 2021

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Disappearing cursor on multi-GPU setup #3030

Disappearing cursor on multi-GPU setup #3030

IntinteDAO commented Jun 27, 2021

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Disappearing cursor on multi-GPU setup #3030

Disappearing cursor on multi-GPU setup #3030

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IntinteDAO commented Jun 27, 2021

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