This bug was fixed in the package libfprint -
1:1.90.3+tod1-0ubuntu2~20.10.2
---------------
libfprint (1:1.90.3+tod1-0ubuntu2~20.10.2) groovy; urgency=medium
* debian/patches:
- image-device: Delay completion until deactivation (LP: #1897613)
- Support more synaptics devices PIDs (LP: #1905593)
- Ensure we properly handle references of prints galleries (LP: #1908107)
libfprint (1:1.90.3+tod1-0ubuntu2~20.10.1) groovy; urgency=medium
* debian/gbp.conf:
- Include debian's GNOME team preferred settings
- Prepare for groovy branching
* debian/patches (upstream cherry-picks):
- Properly handle aes3k devices, resubmitting commands.
This also needs proper commands cancellation (LP: #1897613)
- Add support for new Synaptics devices IDs (LP: #1905593)
- Fix vfs301 verification using device pointer on callbacks (LP: #1905597)
- Ensure we do not waste power for unsupported devices (LP: #1905603)
- Add identification support to synaptics driver.
It allows to unlock / log-in with any finger. (LP: #1905600)
-- Marco Trevisan (Treviño) <[email protected]> Mon, 14 Dec 2020
19:19:45 +0100
** Changed in: libfprint (Ubuntu Groovy)
Status: Fix Committed => Fix Released
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https://bugs.launchpad.net/bugs/1905603
Title:
Unsupported USB devices are using power even if not used
Status in libfprint package in Ubuntu:
Fix Released
Status in libfprint source package in Focal:
Fix Released
Status in libfprint source package in Groovy:
Fix Released
Bug description:
[ Impact ]
Fingerprint devices that we know are not supported, aren't properly
put in power-state mode
[ Test case ]
- Ensure you've a non-supported device from this list:
https://gitlab.freedesktop.org/libfprint/wiki/-/wikis/Unsupported%20Devices#usb-devices
- Ensure the device stays in power-save mode:
- You can use powertop, or follow this [1]
[ Regression potential ]
A device that is supported or used by another tool may be put in
power-save mode
[1]
https://web.archive.org/web/20120420112755/http://www.lesswatts.org/projects
/devices-power-management/usb.php
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/libfprint/+bug/1905603/+subscriptions
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