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XWayland fails to import buffer using GBM on NVIDIA driver 515.76

Using Nvidia driver 515.76 on NVIDIA GeForce GTX 1050 (Ubuntu 22.04), system is dual card laptop (Intel+Nvidia) configured to use Nvidia card. Tested on Weston 9 & Wlroots based compositor using glxgears client.

XWayland errors out with message: Error getting buffer

The error comes from a previous calls to gbm_bo_create_with_modifiers in xwayland-glamor-gbm.c line 295 which returns NULL, so xwl_glamor_gbm_create_pixmap_for_bo is not called and as a result no buffer is available for that resulting pixmap:

Example args used in gbm_bo_create_with_modifiers are: width: 32, height: 32, format: 875713089, num_modifiers: 14 and

  • modifiers (hex):
    • 0
    • 300000000cdb015
    • 300000000cdb014
    • 300000000cdb013
    • 300000000cdb012
    • 300000000cdb011
    • 300000000cdb010
    • 3000000004fe015
    • 3000000004fe014
    • 3000000004fe013
    • 3000000004fe012
    • 3000000004fe011
    • 3000000004fe010
    • ffffffffffffff

Other failing call using same modifiers: width: 300, height: 300, format: 875713112, num_modifiers: 14

Edited by Erik De Rijcke
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