Package: linux-image-amd64 Version: 6.12.41-1 Severity: critical Tags: a11y Justification: breaks the whole system X-Debbugs-Cc: [email protected], [email protected] User: [email protected] Usertags: amd64
After upgrading from Debian 13 testing to stable (released version 13.0), external monitors connected via USB-C docks no longer work. Hardware: - ThinkPad E15 AMD (Ryzen with Radeon Vega Graphics) - AMD Renoir [Radeon Vega Series] (PCI ID: 05:00.0) - Tested with two docks: * HP G4 USB-C Dock (1xHDMI Samsung 4K) * Thinkpad Thunderbolt 4 Workstation Dock (type 40B0) (2xDP ThinkVision 2K) - These both docks still work flawlessly with identical Debian 13 KDE Plasma, with Thinkpad X1 Yoga Gen5, i7-10610U & Intel UHD Graphics Symptoms: - External monitors not detected (xrandr shows only eDP-1) - USB-C dock detected but in "Billboard" mode (USB fallback, no DisplayPort) - No /sys/class/typec/ entries despite typec_ucsi module loaded - Same docks work with Intel-based ThinkPad X1 Yoga Gen5 What worked: - External monitors worked correctly during Debian 13 testing phase - Stopped working after Debian 13 stable release (around one week ago) What was tried: - Fresh reinstall of Debian 13 stable - issue persists - Kernel parameters: usb_storage.quirks, typec.try_role_src=1, amdgpu.dc=0 - Firmware updates (BIOS, dock firmware) - Both Wayland and X11 sessions Expected: External monitors should be detected and usable via USB-C docks Actual: Docks fall back to Billboard mode, no display output This appears to be a regression between testing and stable release. -- System Information: Debian Release: 13.0 APT prefers stable-updates APT policy: (500, 'stable-updates'), (500, 'stable-security'), (500, 'stable') Architecture: amd64 (x86_64) Kernel: Linux 6.12.41+deb13-amd64 (SMP w/8 CPU threads; PREEMPT) Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE not set Shell: /bin/sh linked to /usr/bin/dash Init: systemd (via /run/systemd/system) LSM: AppArmor: enabled Versions of packages linux-image-amd64 depends on: ii linux-image-6.12.41+deb13-amd64 6.12.41-1 linux-image-amd64 recommends no packages. linux-image-amd64 suggests no packages. -- no debconf information
