When a glibc update accidentally breaks Chromium's audio (2021)
Summary
A Flatpak Chromium update to runtime 21.08 triggered audio playback failures due to a glibc 2.33 futex change and the BPF sandbox. The article traces the root cause to glibc passing FUTEX_CLOCK_REALTIME to futex_time64 and Chromium's sandbox not stripping that flag, with a one-line patch providing the fix. It highlights the importance of end-to-end testing when upgrading core runtimes.