Bug#954311: libgl1-mesa-dri: Makes KDE konsole unusable

[Timo Aaltonen <tjaalton@debian.org>]

On 20.3.2020 10.18, Stefan Fritsch wrote:
> Package: libgl1-mesa-dri
> Version: 20.0.2-1
> Followup-For: Bug #954311
> 
> 
> With this mesa version, there are severe drawing artifacts with the kde
> konsole terminal emulator that makes it unusable. I also see problems
> when marking text in thunderbird.
> 
> Downgrading the following packages to 19.3.3-1 fixes the problem:
> 
>  libegl-mesa0
>  libglapi-mesa
>  libgbm1
>  libgl1-mesa-dri
>  libosmesa6
>  libgbm-dev
>  libglx-mesa0
> 
> Cheers,
> Stefan

Please file it upstream, this is caused by the new 'iris' driver. In the
meantime, you can force the previous driver with this in a ~/.drirc:

<driconf>
  <device driver="loader" kernel_driver="i915">
    <option name="dri_driver" value="i965" />
  </device>
</driconf>


Or run the app with the driver to verify it actually helps:

    dri_driver=i965 ./app




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t