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docs(troubleshooting): fix Linux hardware encoding admonition and general cleanup (#4250)

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ReenigneArcher
2025-09-08 18:53:59 -04:00
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@@ -32,11 +32,11 @@ Can't access the web UI?
1. Check firewall rules. 1. Check firewall rules.
### Controller works on Steam but not in games ### Controller works on Steam but not in games
One trick might be to change Steam settings and check or uncheck the configuration to support Xbox/Playstation One trick might be to change Steam settings and check or uncheck the configuration to support Xbox/PlayStation
controllers and leave only support for Generic controllers. controllers and leave only support for Generic controllers.
Also, if you have many controllers already directly connected to the host, it might help to disable them so that the Also, if you have many controllers already directly connected to the host, it might help to disable them so that the
Sunshine provided controller (connected to the guest) is the "first" one. In Linux this can be accomplished on USB Sunshine-provided controller (connected to the guest) is the "first" one. In Linux this can be achieved on USB
devices by finding the device in `/sys/bus/usb/devices/` and writing `0` to the `authorized` file. devices by finding the device in `/sys/bus/usb/devices/` and writing `0` to the `authorized` file.
### Network performance test ### Network performance test
@@ -53,7 +53,7 @@ On the Sunshine host `iperf3` is started in server mode:
iperf3 -s iperf3 -s
``` ```
On the client device iperf3 is asked to perform a 60-second UDP test in reverse On the client device iperf3 is asked to perform a 60-second UDP test in a reverse
direction (from server to client) at a given bitrate (e.g. 50 Mbps): direction (from server to client) at a given bitrate (e.g. 50 Mbps):
```bash ```bash
@@ -61,31 +61,31 @@ iperf3 -c {HostIpAddress} -t 60 -u -R -b 50M
``` ```
Watch the output on the client for packet loss and jitter values. Both should be Watch the output on the client for packet loss and jitter values. Both should be
(very) low. Ideally packet loss remains less than 5% and jitter below 1ms. (very) low. Ideally, packet loss remains less than 5% and jitter below 1 ms.
For Android clients use For Android clients use
[PingMaster](https://play.google.com/store/apps/details?id=com.appplanex.pingmasternetworktools). [PingMaster](https://play.google.com/store/apps/details?id=com.appplanex.pingmasternetworktools).
For iOS clients use [HE.NET Network Tools](https://apps.apple.com/us/app/he-net-network-tools/id858241710). For iOS clients use [HE.NET Network Tools](https://apps.apple.com/us/app/he-net-network-tools/id858241710).
If you are testing a remote connection (over the internet) you will need to If you are testing a remote connection (over the internet), you will need to
forward the port 5201 (TCP and UDP) from your host. forward the port 5201 (TCP and UDP) from your host.
### Packet loss (Buffer overrun) ### Packet loss (Buffer overrun)
If the host PC (running Sunshine) has a much faster connection to the network If the host PC (running Sunshine) has a much faster connection to the network
than the slowest segment of the network path to the client device (running than the slowest segment of the network path to the client device (running
Moonlight), massive packet loss can occur: Sunshine emits its stream in bursts Moonlight), massive packet loss can occur: Sunshine emits its stream in bursts
every 16ms (for 60fps) but those bursts can't be passed on fast enough to the every 16 ms (for 60 fps), but those bursts can't be passed on fast enough to the
client and must be buffered by one of the network devices inbetween. If the client and must be buffered by one of the network devices inbetween. If the
bitrate is high enough, these buffers will overflow and data will be discarded. bitrate is high enough, these buffers will overflow and data will be discarded.
This can easily happen if e.g. the host has a 2.5 Gbit/s connection and the This can easily happen if e.g., the host has a 2.5 Gbit/s connection and the
client only 1 Gbit/s or Wi-Fi. Similarly, a 1 Gbps host may be too fast for a client only 1 Gbit/s or Wi-Fi. Similarly, a 1 Gbps host may be too fast for a
client having only a 100 Mbps interface. client having only a 100 Mbps interface.
As a workaround the transmission speed of the host NIC can be reduced: 1 Gbps As a workaround the transmission speed of the host NIC can be reduced: 1 Gbps
instead of 2.5 or 100 Mbps instead of 1 Gbps. A technically more advanced instead of 2.5 or 100 Mbps instead of 1 Gbps. A technically more advanced
solution would be to configure traffic shaping rules at the OS-level, so that solution would be to configure traffic shaping rules at the OS level, so that
only Sunshine's traffic is slowed down. only Sunshine's traffic is slowed down.
Such a solution on Linux could look like that: Such a solution on Linux could look like that:
@@ -112,7 +112,7 @@ sudo tc filter add dev <NIC> protocol ip parent 1: prio 1 \
``` ```
In that way only the Sunshine traffic is limited by 1 Gbit. This is not persistent on reboots. In that way only the Sunshine traffic is limited by 1 Gbit. This is not persistent on reboots.
If you use a different port for the game stream you need to adjust the last command. If you use a different port for the game stream, you need to adjust the last command.
Sunshine versions > 0.23.1 include improved networking code that should Sunshine versions > 0.23.1 include improved networking code that should
alleviate or even solve this issue (without reducing the NIC speed). alleviate or even solve this issue (without reducing the NIC speed).
@@ -120,7 +120,7 @@ alleviate or even solve this issue (without reducing the NIC speed).
### Packet loss (MTU) ### Packet loss (MTU)
Although unlikely, some guests might work better with a lower Although unlikely, some guests might work better with a lower
[MTU](https://en.wikipedia.org/wiki/Maximum_transmission_unit) from the host. [MTU](https://en.wikipedia.org/wiki/Maximum_transmission_unit) from the host.
For example, a LG TV was found to have 30-60% packet loss when the host had MTU For example, an LG TV was found to have 30–60% packet loss when the host had MTU
set to 1500 and 1472, but 0% packet loss with a MTU of 1428 set in the network card set to 1500 and 1472, but 0% packet loss with a MTU of 1428 set in the network card
serving the stream (a Linux PC). It's unclear how that helped precisely, so it's a last serving the stream (a Linux PC). It's unclear how that helped precisely, so it's a last
resort suggestion. resort suggestion.
@@ -134,19 +134,22 @@ Due to legal concerns, Mesa has disabled hardware decoding and encoding by defau
Error: Could not open codec [h264_vaapi]: Function not implemented Error: Could not open codec [h264_vaapi]: Function not implemented
``` ```
If you see the above error in the Sunshine logs, compiling *Mesa* manually, may be required. See the official Mesa3D If you see the above error in the Sunshine logs, compiling *Mesa* manually may be required. See the official Mesa3D
[Compiling and Installing](https://docs.mesa3d.org/install.html) documentation for instructions. [Compiling and Installing](https://docs.mesa3d.org/install.html) documentation for instructions.
@important{You must re-enable the disabled encoders. You can do so, by passing the following argument to the build @important{You must re-enable the disabled encoders. You can do so by passing the following argument to the build
system. You may also want to enable decoders, however that is not required for Sunshine and is not covered here. system. You may also want to enable decoders, however, that is not required for Sunshine and is not covered here.
```bash ```bash
-Dvideo-codecs=h264enc,h265enc -Dvideo-codecs=h264enc,h265enc
``` ```
} }
@note{Other build options are listed in the
[meson options](https://gitlab.freedesktop.org/mesa/mesa/-/blob/main/meson_options.txt) file.}
### Input not working ### Input not working
After installation, the `udev` rules need to be reloaded. Our post-install script tries to do this for you After installation, the `udev` rules need to be reloaded. Our post-install script tries to do this for you
automatically, but if it fails you may need to restart your system. automatically, but if it fails, you may need to restart your system.
If the input is still not working, you may need to add your user to the `input` group. If the input is still not working, you may need to add your user to the `input` group.
@@ -154,9 +157,6 @@ If the input is still not working, you may need to add your user to the `input`
sudo usermod -aG input $USER sudo usermod -aG input $USER
``` ```
@note{Other build options are listed in the
[meson options](https://gitlab.freedesktop.org/mesa/mesa/-/blob/main/meson_options.txt) file.}
### KMS Streaming fails ### KMS Streaming fails
If screencasting fails with KMS, you may need to run the following to force unprivileged screencasting. If screencasting fails with KMS, you may need to run the following to force unprivileged screencasting.
@@ -181,12 +181,12 @@ Consult your distribution's documentation for details on how to do this. (Most
often grub is used to load the kernel and set its command line.) often grub is used to load the kernel and set its command line.)
### AMD encoding latency issues ### AMD encoding latency issues
If you notice unexpectedly high encoding latencies (e.g. in Moonlight's If you notice unexpectedly high encoding latencies (e.g., in Moonlight's
performance overlay) or strong fluctuations thereof, your system's Mesa performance overlay) or strong fluctuations thereof, your system's Mesa
libraries are outdated (<24.2). This is particularly problematic at higher libraries are outdated (<24.2). This is particularly problematic at higher
resolutions (4K). resolutions (4K).
Starting with Mesa-24.2 applications can request a Starting with Mesa-24.2, applications can request a
[low-latency mode](https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/30039) [low-latency mode](https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/30039)
by running them with a special by running them with a special
[environment variable](https://docs.mesa3d.org/envvars.html#envvar-AMD_DEBUG): [environment variable](https://docs.mesa3d.org/envvars.html#envvar-AMD_DEBUG):
@@ -224,7 +224,7 @@ Verify that you've installed [Nefarius Virtual Gamepad](https://github.com/nefar
### Permission denied ### Permission denied
Since Sunshine runs as a service on Windows, it may not have the same level of access that your regular user account Since Sunshine runs as a service on Windows, it may not have the same level of access that your regular user account
has. You may get permission denied errors when attempting to launch a game or application from a non system drive. has. You may get permission denied errors when attempting to launch a game or application from a non-system drive.
You will need to modify the security permissions on your disk. Ensure that user/principal SYSTEM has full You will need to modify the security permissions on your disk. Ensure that user/principal SYSTEM has full
permissions on the disk. permissions on the disk.