Linux device manager for Logitech devices
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Ken Sanislo d24677eb84 Don't misreport empty-ACK writes as failed (Setting.write)
HID++ 2.0 'set' operations (SetSidetone, SetAutoSleep, SetMicGain etc.)
frequently respond with an empty ACK — just the echoed request_id with
no data bytes after. device.feature_request() strips the request_id
echo and returns the remaining payload, so our reply variable is b""
for these successful writes.

The old check `if not reply:` evaluates b"" as falsy, so we returned
None from Setting.write, which the GUI interpreted as "Read/write
operation failed" — even though the device actually succeeded.

Change the check to `if reply is None:` so empty bytes (success) pass
through and only genuine transport failures (None return from base.request)
are flagged as errors. Also add an INFO log on the real failure path so
the user can tell from the log whether a write reached the device.

This likely fixes the G522 sidetone / mic-gain / auto-sleep "Read/write
operation failed" reports — all of those features return empty ACKs for
set operations.
2026-04-17 19:49:20 -07:00
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README.md

Solaar

Solaar is a Linux manager for many Logitech keyboards, mice, and other devices that connect wirelessly to a Unifying, Bolt, Lightspeed or Nano receiver as well as many Logitech devices that connect via a USB cable or Bluetooth. Solaar is not a device driver and responds only to special messages from devices that are otherwise ignored by the Linux input system.

More Information - Usage - Capabilities - Rules - Manual Installation - Known Issues

codecov License: GPL v2

 

 

Solaar supports:

  • pairing/unpairing of devices with receivers
  • configuring device settings
  • custom button configuration
  • running rules in response to special messages from devices

For more information see the main Solaar documentation page. -

Installation Packages

Up-to-date prebuilt packages are available for some Linux distros (e.g., Fedora) in their standard repositories. If a recent version of Solaar is not available from the standard repositories for your distribution, you can try one of these packages:

Solaar is available from some other repositories but may be several versions behind the current version: