Package: libc6 Version: 2.41-12+deb13u1 Severity: important X-Debbugs-Cc: [email protected]
Dear Maintainer, After upgrading to glibc 2.41-12+deb13u1 (Debian 13.3 point release on January 10, 2026), all KDE/Qt applications experience severe startup delays of 1-3 seconds. Previously these applications started instantly. What led up to the situation: System was updated with 'apt upgrade' which included the glibc update from the 13.3 point release. What exactly did you do: Tested multiple terminals and applications: - Konsole: 2-3 second startup delay - Alacritty: 1-2 second startup delay - Other Qt/KDE applications show similar slowdown - Non-Qt applications (xterm) start instantly What was the outcome: All Qt/KDE applications now have significant startup delays making the system feel sluggish and unresponsive. What outcome did you expect: Applications should start instantly as they did before the update. Additional information: - Tested on both kernel 6.12.57 and 6.12.63 - issue persists on both - GLIBC_TUNABLES=glibc.rtld.execstack=1 workaround does NOT resolve the issue - Intel Iris Xe Graphics (amd64), KDE Plasma on Wayland - This represents a significant usability regression for a stable release -- System Information: Debian Release: 13.3 APT prefers stable-updates APT policy: (500, 'stable-updates'), (500, 'stable-security'), (500, 'stable') Architecture: amd64 (x86_64) Kernel: Linux 6.12.63+deb13-amd64 (SMP w/8 CPU threads; PREEMPT) Kernel taint flags: TAINT_PROPRIETARY_MODULE, TAINT_OOT_MODULE, TAINT_UNSIGNED_MODULE Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8), LANGUAGE=en_GB:en Shell: /bin/sh linked to /usr/bin/dash Init: systemd (via /run/systemd/system) LSM: AppArmor: enabled Versions of packages libc6 depends on: ii libgcc-s1 14.2.0-19 Versions of packages libc6 recommends: ii libidn2-0 2.3.8-2 Versions of packages libc6 suggests: ii debconf [debconf-2.0] 1.5.91 pn glibc-doc <none> ii libc-l10n 2.41-12+deb13u1 pn libnss-nis <none> pn libnss-nisplus <none> ii locales 2.41-12+deb13u1 -- debconf information excluded
