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[doc] faq: B4-rc2 touchups

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Jonathan Rubenstein 2021-07-09 23:09:31 -04:00 committed by Geoffrey McRae
parent 511adbba68
commit 7083b73720
1 changed files with 17 additions and 14 deletions
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doc/faq.rst
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@ -31,13 +31,6 @@ There are several reasons why this can happen, the most common are your
capture resolution, or refresh rate. The windows capture methods currently capture resolution, or refresh rate. The windows capture methods currently
struggle to capture high resolutions under certain circumstances. 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 Some titles do some strange things at early initialization that cause
capture performance issues. One such title is the Unigine Valley capture performance issues. One such title is the Unigine Valley
benchmark where the capture rate is limited to 1/2 the actual rate. For benchmark where the capture rate is limited to 1/2 the actual rate. For
@ -137,6 +130,16 @@ NvFBC (NVIDIA Capture API) doesn't work
NvFBC is only supported on professional-grade GPUs, and will not function on NvFBC is only supported on professional-grade GPUs, and will not function on
consumer-grade cards like those from the GeForce series. consumer-grade cards like those from the GeForce series.
If you have a supported card, you can enable NVFBC by adding the following
to the host ini file, found at
``%ProgramFiles%\Looking Glass (host)\looking-glass-host.ini``
(create one if it doesn't exist):
.. code:: INI
[app]
capture=nvfbc
.. _the_screen_stops_updating_when_left_idle_for_a_time: .. _the_screen_stops_updating_when_left_idle_for_a_time:
The screen stops updating when left idle for a time The screen stops updating when left idle for a time
@ -205,8 +208,9 @@ This is intentional for several reasons.
position as NVIDIA decided to not provide this as part of the cursor position as NVIDIA decided to not provide this as part of the cursor
updates. updates.
2. NvFBC requires administrator level access to enable the interface in 2. NvFBC requires administrator level access to enable the interface in
the first place. (WIP) the first place.
3. DXGI performance can be improved if we have this. (WIP) 3. General capture performance is boosted by taking advantage of high priority
scheduling with SYSTEM level privileges.
NvFBC (NVIDIA Frame Buffer Capture) NvFBC (NVIDIA Frame Buffer Capture)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
@ -217,8 +221,6 @@ Why can't I compile NvFBC support into the host?
You must download and install the NVidia Capture SDK. Please note that 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. by doing so you will be agreeing to NVIDIA's SDK License agreement.
*-Geoff*
.. _a_note_about_ivshmem_and_scream_audio: .. _a_note_about_ivshmem_and_scream_audio:
Why doesn't Looking Glass work with Scream over IVSHMEM? Why doesn't Looking Glass work with Scream over IVSHMEM?
@ -236,9 +238,10 @@ 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 If you insist on using IVSHMEM for Scream—despite its inferiority to the
default network implementation—the Windows Host Application can be told default network implementation—the Windows Host Application can be told
what device to use. Create a ``looking-glass-host.ini`` file in the same what device to use. Edit the file
directory as the looking-glass-host.exe file. In it, you can use the ``%ProgramFiles%\Looking Glass (host)\looking-glass-host.ini``,
``os:shmDevice`` option like so: (create one if it doesn't exist)
then, you can add the ``os:shmDevice`` option like so:
.. code:: INI .. code:: INI