Bug#1107962: libwebkit2gtk-4.1-0: After upgrade, breaks evolution display of messages, liferea previews

[John M.]

I have an NVIDIA card, and it's running on X11 (no Wayland).

Besides the libwebkit2gtk change from 2.48.1-3 to 2.48.3-1, the upgrade
included the NVIDIA driver going from 535.247.01-1 to 550.163.01-1.

Running with the suggested environment variables to disable DMABUF
suppresses the error from nv_gbm.c but makes no difference when it
comes to the background in the messages:

   $ WEBKIT_DISABLE_DMABUF_RENDERER=1 evolution
   
   (org.gnome.Evolution:720943): camel-WARNING **: 08:06:28.309: Could not
   open converter for 'iso-646-us' to 'UTF-8' charset
   
   (org.gnome.Evolution:720943): camel-WARNING **: 08:06:33.650: Could not
   open converter for 'UNKNOWN' to 'UTF-8' charset
   

Trying to force DMABUF still throws one error instead of two, but again
there's no difference when it comes to the mesagges background:

   $ WEBKIT_FORCE_DMABUF_RENDERER=1 evolution
   src/nv_gbm.c:288: GBM-DRV error (nv_gbm_create_device_native):
   nv_common_gbm_create_device failed (ret=-1)
   
   
   (org.gnome.Evolution:721228): camel-WARNING **: 08:10:27.268: Could not
   open converter for 'iso-646-us' to 'UTF-8' charset
   
   (org.gnome.Evolution:721228): camel-WARNING **: 08:10:32.521: Could not
   open converter for 'UNKNOWN' to 'UTF-8' charset
   
   
This is the system report given by GNOME Settings:

# System Details Report
---

## Report details
- **Date generated:** 2025-06-18 08:21:29

## Hardware Information:
- **Hardware Model:** Lenovo ThinkPad P15 Gen 1
- **Memory:** 32.0 GiB
- **Processor:** Intel® Core™ i9-10885H × 16
- **Graphics:** Quadro T2000
- **Graphics 1:** Quadro T2000
- **Disk Capacity:** 3.0 TB

## Software Information:
- **Firmware Version:** N30ET57W (1.40 )
- **OS Name:** Debian GNU/Linux 13 (trixie)
- **OS Build:** (null)
- **OS Type:** 64-bit
- **GNOME Version:** 48
- **Windowing System:** X11
- **Kernel Version:** Linux 6.12.30-amd64


On Wed, 2025-06-18 at 12:37 +0200, Alberto Garcia wrote:
> On Tue, Jun 17, 2025 at 10:52:59PM -0500, John M. wrote:
> > After an apt upgrade over the weekend (and system reboot),
> > evolution
> > emails are displayed with a white background, even with dark
> > mode/theme enabled. That's an accessibility-related issue for me.
> 
> Hi, do you have an NVIDIA graphics card?
> 
> Can you try running evolution with this environment variable?
> 
>    WEBKIT_DISABLE_DMABUF_RENDERER=1
> 
> And what happens if you use this one instead?
> 
>    WEBKIT_FORCE_DMABUF_RENDERER=1
> 
> Thanks,
> 
> Berto
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