Update troubleshooting guide with graphics driver updating advice (#6756

)

### What

* Fixes #6749

### Checklist
* [x] I have read and agree to [Contributor
Guide](https://github.com/rerun-io/rerun/blob/main/CONTRIBUTING.md) and
the [Code of
Conduct](https://github.com/rerun-io/rerun/blob/main/CODE_OF_CONDUCT.md)
* [x] I've included a screenshot or gif (if applicable)
* [x] I have tested the web demo (if applicable):
* Using examples from latest `main` build:
[rerun.io/viewer](https://rerun.io/viewer/pr/6756?manifest_url=https://app.rerun.io/version/main/examples_manifest.json)
* Using full set of examples from `nightly` build:
[rerun.io/viewer](https://rerun.io/viewer/pr/6756?manifest_url=https://app.rerun.io/version/nightly/examples_manifest.json)
* [x] The PR title and labels are set such as to maximize their
usefulness for the next release's CHANGELOG
* [x] If applicable, add a new check to the [release
checklist](https://github.com/rerun-io/rerun/blob/main/tests/python/release_checklist)!

- [PR Build Summary](https://build.rerun.io/pr/6756)
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docs/content/getting-started/troubleshooting.md

@@ -41,7 +41,9 @@ sudo dnf install \
     pkg-config
 ```
 
-On WSL2, in addition to the above packages for Linux, you also need to run:
+### WSL2
+
+In addition to the above packages for Linux, you also need to run:
 
 ```sh
 sudo apt-get -y install \
@@ -54,6 +56,13 @@ sudo apt-get -y install \
 [TODO(#1250)](https://github.com/rerun-io/rerun/issues/1250): Running with the wayland window manager
 sometimes causes Rerun to crash. Try unsetting the wayland display (`unset WAYLAND_DISPLAY` or `WAYLAND_DISPLAY= `) as a workaround.
 
+If you have a multi-gpu setup, Mesa may only report the integrated GPU such that Rerun can't pick the dedicated graphics card.
+To mitigate that set `export MESA_D3D12_DEFAULT_ADAPTER_NAME=NVIDIA` (or `export MESA_D3D12_DEFAULT_ADAPTER_NAME=AMD` respectively for an AMD graphics card).
+
+Since the Mesa driver on WSL dispatches to the Windows host graphics driver, it is important to keep the Windows drivers up-to-date as well.
+For example, [line rendering issues](https://github.com/rerun-io/rerun/issues/6749) have been observed when running from WSL with an
+outdated AMD driver on the Windows host.
+
 ## Startup issues
 
 If Rerun is having trouble starting, you can try resetting its memory with:
@@ -66,6 +75,8 @@ rerun reset
 
 <!-- This section is linked to from `crates/re_viewer/src/native.rs` -->
 
+Make sure to keep your graphics drivers updated.
+
 [Wgpu](https://github.com/gfx-rs/wgpu) (the graphics API we use) maintains a list of
 [known driver issues](https://github.com/gfx-rs/wgpu/wiki/Known-Driver-Issues) and workarounds for them.