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Crea 15A8RTX - External monitor issues with hybrid GPU on Wayland

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mstevens

Hi all,

I've got a Crea 15A8RTX (Ryzen 8845HS / 780M + RTX 4070) running stock SlimbookOS. I'm hitting display stability issues when using an external monitor under Wayland, and I'm curious if others have seen this.

The problem depends on how I connect the monitor:

1. Direct HDMI (routes through NVIDIA GPU)

  • KWin logs thousands of GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT errors from boot
  • Eventually crashes the compositor, killing all apps
  • Suspend/resume works OK

2. USB-C via hub (routes through AMD GPU)

  • No framebuffer errors - runs clean
  • But suspend/resume fails with "Pageflip timed out" amdgpu errors
  • Requires power cycle to recover

Key finding: When both displays are on the AMD GPU (internal + external via USB-C), the framebuffer errors stop completely. The issue seems to be cross-GPU compositing - KWin rendering on AMD but outputting to NVIDIA's HDMI.

System info:

  • Kernel: 6.14.0-1018-oem
  • Mesa: 25.0.7
  • KDE Plasma 6.x, Wayland


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Samanta Sanchez Slimbook
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Good morning,
Depending on which version of the nvidia driver you have you could try to switch to the other version to see if it mitigates the issue (open -> closed) (closed -> open)

Regarding suspend/resume fails, you could try using 6.17 AKA linux-oem-24.04d and see if that kernels fixes the issues with amdgpu

Regards,

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mstevens
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I'm on closed drivers (580.95.05) and 6.14. I can experiment, although I do like the GPU performance of closed drivers.

I've installed 6.17 and I'll test with that for a few days.

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mstevens
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Ok testing with 6.17 - seemed good at first, not the same errors, but still having trouble waking from sleep with an external monitor connected.

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mstevens
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So far the nouveau open source drivers are stable without resume issues, but performance is visibly worse.

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Samanta Sanchez Slimbook
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Hello,
My apologies, as for the open driver that I mentioned, that was referring to nvidia-dkms-open drivers from NVIDIA, not nouveau from freedesktop

Regards,

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mstevens
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Ok successfully installed now, thanks for the correction. Although it was interesting data that nouveau was stable too!

Initially the open driver seems stable, I'll give it some testing, this is an intermittent issue.

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mstevens
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I've been testing with the nvidia-dkms-open drivers for a month or so now, no problems seen.

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