[plasma-login-manager] [Bug 523160] kwin_wayland: Failed to open drm device /dev/dri/card1 (AMD Graphics) on Plasma 6.7.x Black screen on login with no cursor

Zamundaaa <[email protected]> Tue, 04 Aug 2026 14:57:28 +0000

Newsgroups	gmane.comp.kde.devel.bugs
Message-ID	<[email protected]/>

https://bugs.kde.org/show_bug.cgi?id=3D523160

Zamundaaa <[email protected]> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |[email protected],
                   |                            |[email protected],
                   |                            |[email protected]
     Ever confirmed|0                           |1
            Product|kwin                        |plasma-login-manager
             Status|REPORTED                    |CONFIRMED
           Assignee|[email protected]      |[email protected]
          Component|wayland-generic             |general

--- Comment #8 from Zamundaaa <[email protected]> ---
> Failed to open drm node /dev/dri/renderD128: Permission denied
That one should never ever ever happen, but it's outside of KWin's control.

> Could not determine the active graphical session
Same with this.

> kwin_wayland[2188]: Failed to open /dev/dri/card1 device (Device or resou=
rce busy)
This looks more familiar, and it's a problem in plasma login manager - it
starts KWin too early on your PC. KWin 6.8 should handle it either way, but
this needs to be fixed in PLM.

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