Authentication fails when using Imagewriter

[scotty65]

@fdietreich

Also gets ‘Authentication fails’ error when trying to install ISO Image writer from the Software repository

Sounds like it might be the polkit issue mentioned in the Known issues and solutions section of the 2026-01-04 & 2026-01-13 Stable branch update announcements. The fix is included in that post:

[Stable Update] 2026-01-04 - Manjaro 26.0, Mesa, Firefox, LibreOffice, COSMIC

Known issues and solutions This is a wiki post; please edit as necessary. Please, consider subscribing to the Stable Updates Announcements RSS feed Please RTFT (Read This Fine Thread) first before reporting the same issues over and over again! Note: Do not forget to review your .pacnew files: Update preppers handbook System Maintenance - Manjaro Check and manage pacnew files Prepare the update beforehand Preparation steps 2026-01-04 problems with polkit NVIDIA 5…