mirror of
https://github.com/gnif/LookingGlass.git
synced 2024-12-23 06:11:46 +00:00
272 lines
8.7 KiB
ReStructuredText
272 lines
8.7 KiB
ReStructuredText
Frequently Asked Questions
|
|
##########################
|
|
|
|
General
|
|
-------
|
|
|
|
.. _how_does_looking_glass_work:
|
|
|
|
How does Looking Glass work?
|
|
~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
|
|
Please see the following video that covers this:
|
|
|
|
https://www.youtube.com/watch?v=U44lihtNVVM
|
|
|
|
.. _can_i_feed_the_vm_directly_into_obs:
|
|
|
|
Can I feed the VM directly into OBS?
|
|
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
|
|
Looking Glass now features a functional :doc:`OBS plugin <obs>`, which acts as
|
|
another Looking Glass client, but instead gives the captured frames to OBS.
|
|
|
|
.. _why_is_my_ups_so_low:
|
|
|
|
Why is my UPS (Updates Per Second) so low?
|
|
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
|
|
There are several reasons why this can happen, the most common are your
|
|
capture resolution, or refresh rate. The windows capture methods currently
|
|
struggle to capture high resolutions under certain circumstances.
|
|
|
|
Another cause can be how the game or application you are running is
|
|
configured. Because of the way windows integrate with the WDM (Windows
|
|
Desktop Manager), running applications in "Full Screen" mode may—in some
|
|
cases—cause a large performance penalty. Try switching to windowed
|
|
full-screen mode, the difference in performance can be like night and
|
|
day.
|
|
|
|
Some titles do some strange things at early initialization that cause
|
|
capture performance issues. One such title is the Unigine Valley
|
|
benchmark where the capture rate is limited to 1/2 the actual rate. For
|
|
an unknown reason to both myself and the Unigine developers a simple
|
|
task switch (alt+tab) in and out resolves the issue. This is not a
|
|
Looking Glass bug.
|
|
|
|
.. _is_my_gpu_supported:
|
|
|
|
Is my GPU supported?
|
|
~~~~~~~~~~~~~~~~~~~~
|
|
|
|
Your guest GPU almost certainly supports DXGI. Use DxDiag to confirm
|
|
that you have support for WDDM 1.2 or greater.
|
|
|
|
The server-side (guest) probing error "Capture is not possible,
|
|
unsupported device or driver" indicates NVidia duplication has failed,
|
|
not that DXGI has failed. You can fix the error by specifying
|
|
``-c DXGI``
|
|
|
|
.. _why_do_i_need_spice_if_i_dont_want_a_spice_display_device:
|
|
|
|
Why do I need Spice if I don't want a Spice display device?
|
|
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
|
|
You don't need Display Spice enabled. Looking Glass has a Spice client
|
|
built in to provide some conveniences, but you can disable it with the
|
|
"-s" argument.
|
|
|
|
Note that without Spice, you will not be sending mouse/keyboard events
|
|
to the guest, nor will you get clipboard synchronization support.
|
|
|
|
.. _where_is_the_host_application_for_linux:
|
|
|
|
Where is the host application for Linux?
|
|
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
|
|
The "Windows host application" is actually the display server, which
|
|
runs in the guest VM. The only thing that needs to run in your Linux
|
|
host OS is the \`looking-glass-client\` application.
|
|
|
|
Mouse
|
|
-----
|
|
|
|
.. _the_mouse_is_jumpy_slow_laggy_when_using_spice:
|
|
|
|
The mouse is jumpy, slow, laggy when using SPICE
|
|
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
|
|
Please be sure to install the SPICE guest tools from
|
|
https://www.spice-space.org/download.html#windows-binaries.
|
|
|
|
.. _how_to_enable_clipboard_synchronization_via_spice:
|
|
|
|
How to enable clipboard synchronization via SPICE
|
|
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
|
|
Install the SPICE guest tools from
|
|
https://www.spice-space.org/download.html#windows-binaries.
|
|
|
|
Choose only one of the settings below (the one that applies to your
|
|
configuration):
|
|
|
|
- QEMU
|
|
|
|
.. code:: bash
|
|
|
|
-device virtio-serial-pci \
|
|
-chardev spicevmc,id=vdagent,name=vdagent \
|
|
-device virtserialport,chardev=vdagent,name=com.redhat.spice.0
|
|
|
|
- libvirt
|
|
|
|
- Edit the VM using virsh ``sudo virsh edit VIRTUAL_MACHINE_NAME``
|
|
- Paste the code from below right above (note the closing tag)
|
|
|
|
.. code:: xml
|
|
|
|
<!-- No need to add VirtIO Serial device, it will be added automatically -->
|
|
<channel type="spicevmc">
|
|
<target type="virtio" name="com.redhat.spice.0"/>
|
|
<address type="virtio-serial" controller="0" bus="0" port="1"/>
|
|
</channel>
|
|
|
|
.. _the_mouse_doesnt_stay_aligned_with_the_host.:
|
|
|
|
The mouse doesn't stay aligned with the host.
|
|
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
|
|
This is intentional. The host's mouse no longer interacts with your operating
|
|
system, and is completely captured by Looking Glass.
|
|
|
|
.. _the_cursor_position_doesnt_update_until_i_click:
|
|
|
|
The cursor position doesn't update until I click
|
|
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
|
|
Make sure you have removed the Virtual Tablet Device from the Virtual
|
|
Machine. Due to the design of windows absolute pointing devices break
|
|
applications/games that require cursor capture and as such Looking Glass
|
|
does not support them.
|
|
|
|
Audio
|
|
-----
|
|
|
|
Looking Glass does not support audio routing. The preferred
|
|
solution is to pass through QEMU's audio to your host's audio system.
|
|
|
|
Another popular solution is to use
|
|
`Scream <https://github.com/duncanthrax/scream>`_, a virtual sound card which
|
|
pipes audio through the network. A guide for setting up scream is available on
|
|
the wiki: https://looking-glass.io/wiki/Using_Scream_over_LAN
|
|
|
|
.. _faq_win:
|
|
|
|
Windows
|
|
-------
|
|
|
|
.. _nvfbc_nvidia_capture_api_doesnt_work:
|
|
|
|
NvFBC (NVIDIA Capture API) doesn't work
|
|
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
|
|
NvFBC is only supported on professional-grade GPUs, and will not function on
|
|
consumer-grade cards like those from the GeForce series.
|
|
|
|
.. _the_screen_stops_updating_when_left_idle_for_a_time:
|
|
|
|
The screen stops updating when left idle for a time
|
|
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
|
|
Windows is likely turning off the display to save power, you can prevent
|
|
this by adjusting the \`Power Options\` in the control panel.
|
|
|
|
.. _faq_host:
|
|
|
|
Host
|
|
----
|
|
|
|
Where is the log?
|
|
~~~~~~~~~~~~~~~~~
|
|
|
|
The log file for the host application is located at::
|
|
|
|
%ProgramData%\Looking Glass (host)\looking-glass-host.txt
|
|
|
|
You can also find out where the file is by right clicking on the tray
|
|
icon and selecting "Log File Location".
|
|
|
|
The log file for the looking glass service is located at::
|
|
|
|
%ProgramData%\Looking Glass (host)\looking-glass-host-service.txt
|
|
|
|
This is useful for troubleshooting errors related to the host
|
|
application not starting.
|
|
|
|
High priority capture using DXGI and Secure Desktop (UAC) capture support
|
|
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
|
|
|
By default Windows gives priority to the foreground application for any
|
|
GPU work which causes issues with capture if the foreground application
|
|
is consuming 100% of the available GPU resources. The looking glass host
|
|
application is able to increase the kernel GPU thread to realtime
|
|
priority which fixes this, but in order to do so it must run as the
|
|
``SYSTEM`` user account. To do this, Looking Glass needs to run as a
|
|
service. This can be accomplished by either using the NSIS installer
|
|
which will do this for you, or you can use the following command to
|
|
Install the service manually:
|
|
|
|
::
|
|
|
|
looking-glass-host.exe InstallService
|
|
|
|
To remove the service use the following command:
|
|
|
|
::
|
|
|
|
looking-glass-host.exe UninstallService
|
|
|
|
This will also enable the host application to capture the secure desktop
|
|
which includes things like the lock screen and UAC prompts.
|
|
|
|
.. _faq_host_admin_privs:
|
|
|
|
Why does the host require Administrator privileges?
|
|
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
|
|
This is intentional for several reasons.
|
|
|
|
1. NvFBC requires a system wide hook to correctly obtain the cursor
|
|
position as NVIDIA decided to not provide this as part of the cursor
|
|
updates.
|
|
2. NvFBC requires administrator level access to enable the interface in
|
|
the first place. (WIP)
|
|
3. DXGI performance can be improved if we have this. (WIP)
|
|
|
|
NvFBC (NVIDIA Frame Buffer Capture)
|
|
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
|
|
Why can't I compile NvFBC support into the host?
|
|
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
|
|
|
You must download and install the NVidia Capture SDK. Please note that
|
|
by doing so you will be agreeing to NVIDIA's SDK License agreement.
|
|
|
|
*-Geoff*
|
|
|
|
.. _a_note_about_ivshmem_and_scream_audio:
|
|
|
|
Why doesn't Looking Glass work with Scream over IVSHMEM?
|
|
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
|
|
|
.. warning::
|
|
Using IVSHMEM with Scream may interfere with Looking Glass, as they may try
|
|
to use the same device.
|
|
|
|
Please do not use the IVSHMEM plugin for Scream.
|
|
To fix this issue, use the default network transfer method.
|
|
The IVSHMEM method induces additional latency that is built into its
|
|
implementation. When using VirtIO for a network device the VM is already using
|
|
a highly optimized memory copy anyway so there is no need to make another one.
|
|
|
|
If you insist on using IVSHMEM for Scream—despite its inferiority to the
|
|
default network implementation—the Windows Host Application can be told
|
|
what device to use. Create a ``looking-glass-host.ini`` file in the same
|
|
directory as the looking-glass-host.exe file. In it, you can use the
|
|
``os:shmDevice`` option like so:
|
|
|
|
.. code:: INI
|
|
|
|
[os]
|
|
shmDevice=1
|
|
|