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Description
NVIDIA Open GPU Kernel Modules Version
575.57.08
Please confirm this issue does not happen with the proprietary driver (of the same version). This issue tracker is only for bugs specific to the open kernel driver.
- I confirm that this does not happen with the proprietary driver package.
Operating System and Version
Archlinux
Kernel Release
Linux 6.14.9-arch1-1 #1 SMP PREEMPT_DYNAMIC
Please confirm you are running a stable release kernel (e.g. not a -rc). We do not accept bug reports for unreleased kernels.
- I am running on a stable kernel release.
Hardware: GPU
GPU 0: NVIDIA GeForce RTX 4070 Laptop GPU (UUID: GPU-85fade4b-34aa-55e3-2fe2-caacc7060d25)
Describe the bug
After upgrading to version 575.57.08, only one (out of two) external display is detected.
Additionally, there are errors related to the NVIDIA driver logged in the system:
Failed to add connector for NvKmsKapiDisplay
After reverting to version 570.153.02, both external displays work as expected, and there are no nvidia_drm errors in the dmesg output.
Attached logs for both 575 and 570 for comparison.
System:
Dell G16 7630 (Laptop)
GeForce RTX 4070
Archlinux
The displays are connected via HDMI ports provided by a USB-C hub.
The integrated Intel GPU is disabled in the BIOS.
Error found for driver 575:
[ 28.352285] [drm:nv_drm_load [nvidia_drm]] *ERROR* [nvidia-drm] [GPU ID 0x00000100] Failed to add connector for NvKmsKapiDisplay 0x00000100
[ 38.440453] [drm:nv_drm_load [nvidia_drm]] *ERROR* [nvidia-drm] [GPU ID 0x00000100] Failed to get dynamic displays
...
[ 48.520393] [drm:nv_drm_event_callback [nvidia_drm]] *ERROR* [nvidia-drm] [GPU ID 0x00000100] Failed to add encoder for NvKmsKapiDisplay 0x00000001
...
[ 48.536896] Call Trace:
[ 48.536896]
[ 48.536898] ? up+0x54/0xa0
[ 48.536902] ? __pfx__main_loop+0x10/0x10 [nvidia_modeset b6a132ebbd8d22d47c4eca2f95727419b05218ff]
[ 48.536927] nv_drm_event_callback+0x83/0x90 [nvidia_drm 467bc9be7922a385de83130999189aa615bf84d5]
[ 48.536930] nvKmsKapiHandleEventQueueChange+0xa7/0xe0 [nvidia_modeset b6a132ebbd8d22d47c4eca2f95727419b05218ff]
[ 48.536947] _main_loop+0x90/0x150 [nvidia_modeset b6a132ebbd8d22d47c4eca2f95727419b05218ff]
[ 48.536958] ? __pfx__main_loop+0x10/0x10 [nvidia_modeset b6a132ebbd8d22d47c4eca2f95727419b05218ff]
[ 48.536968] kthread+0xec/0x230
[ 48.536971] ? __pfx_kthread+0x10/0x10
[ 48.536973] ret_from_fork+0x31/0x50
[ 48.536975] ? __pfx_kthread+0x10/0x10
[ 48.536977] ret_from_fork_asm+0x1a/0x30
[ 48.536979]
To Reproduce
Just restart the system.
Bug Incidence
Always
nvidia-bug-report.log.gz
575-nvidia-bug-report.log.gz - current version, only one external display works, errors in dmesg
570-nvidia-bug-report.log.gz - prev. version, two external displays work, no error
More Info
No response