item view is blank and "DRM_IOCTL_NVIDIA_GEM_ALLOC_NVKMS_MEMORY failed"

[mozai]

Ran into this today, pretty weird because it was working hours ago and then stopped working without restarting liferea. Not a liferea problem it's a webkit+Nvidia problem, but leaving this here so others can find it.

Software versions:

• liferea 1.14.6
• Linux kernel 5.15.133
• NVidia drivers 535.113.01
• qt5-webkit 5.212.0alpha4-20

What I saw:

• using liferea normally, select a new item and the item view frame is blank. Can still click on the places where I'd expect item title or item URL to be to provoke reactions.
• when starting from commandline, see errors like this:

  Failed to create GBM buffer of size 469x230: Invalid argument
  src/nv_gbm.c:99: GBM-DRV error (nv_gbm_bo_create): DRM_IOCTL_NVIDIA_GEM_ALLOC_NVKMS_MEMORY failed (ret=-1)
  Failed to create GBM buffer of size 469x230: Invalid argument
  Failed to create EGL images for DMABufs with file descriptors -1, -1 and -1
  

Workaround:

• quit liferea
• in a terminal window export __NV_PRIME_RENDER_OFFLOAD=1 ; liferea
  new message on stderr:

  ** (liferea:28837): WARNING **: 12:39:13.303: Disabled hardware 
  acceleration because GTK failed to initialize GL: No available
  configurations for the given RGBA pixel format.
  

Would be nice if liferea had switches for webkit config, so I could turn off hw acceleration without using env vars, but this is someone else's mistakes, somewhere between qt5 devs and Nvidia. Hell, if this fixes the media encapsulation sometimes crashing so hard it takes liferea down with it, I'll keep the workaround.

[bbhtt]

This is a webkit2gtk bug https://bugs.webkit.org/show_bug.cgi?id=261874 for NVIDIA users, WEBKIT_DISABLE_DMABUF_RENDERER=1 liferea is a workaround I think

qt5-webkit 5.212.0alpha4-20

Liferea does not use Qt/qt webkit

[paulgevers]

In Debian, I received bug 1053199 which seems very related. Several reporters acknowledged that using WEBKIT_DISABLE_DMABUF_RENDERER=1 liferea worked around their problems too.

[sjehuda]

This problem was observed on Arch Linux and postmarketOS.

Rendering works, though nothing is displayed.

Please see more information at Arch Linux and postmarketOS

Arch Linux
https://bbs.archlinux.org/viewtopic.php?pid=2170335#p2170335

postmarketOS
https://gitlab.com/postmarketOS/pmaports/-/issues/2793

Source: https://bugs.webkit.org/show_bug.cgi?id=274465