[Bug 2172915] Re: HDMI output on Intel Iris Plus G1 (Ice Lake) with NVIDIA MX130 hangs system and shows “No signal” on kernel 7.0.0-42 (Ubuntu 26.04.1)

** Tags added: kernel-daily-bug -- You received this bug notification because you are subscribed to linux in Ubuntu. Matching subscriptions: Bgg, Bmail, Nb https://bugs.launchpad.net/bugs/2172915 Title: HDMI output on Intel Iris Plus G1 (Ice Lake) with NVIDIA MX130 hangs system and shows “No signal” on kernel 7.0.0-42 (Ubuntu 26.04.1) Status in linux package in Ubuntu: New Bug description: Hardware: HP Laptop 15-dw2xxx (product number 2T772EA, BIOS F.01, Insyde), Intel Core i5-1035G1, Intel Iris Plus Graphics G1 (Ice Lake, PCI 00:02.0), NVIDIA GeForce MX130 (GM108M, PCI 01:00.0). Software: Ubuntu 26.04.1 LTS, kernel 7.0.0-42-generic (also reproduced with 7.0.0-38-generic), NVIDIA driver 580.178.04 when installed. Problem: when an external monitor is connected to the laptop’s HDMI port while the desktop is running, the internal screen goes black, the external monitor reports “No signal detected”, and the system freezes completely (in some cases the Caps Lock LED blinks). A forced power- off is required. Booting without the cable works normally. The HDMI ports (card1-HDMI-A-1 and card1-HDMI-A-2) are attached to the Intel GPU (0000:00:02.0) according to /sys/class/drm. Working comparison: the same cable and monitor work with Windows on another laptop. Ubuntu 23.04 Live from USB (kernel 6.2.0-20-generic) also works with the same hardware, with the external monitor showing the image correctly. In that session the Intel GPU uses the i915 driver and the NVIDIA GPU uses nouveau. Things already tried without success: kernel parameters i915.enable_psr=0 and i915.enable_dc=0 (confirmed active via /proc/cmdline), nvidia-drm.modeset=0, booting the older 7.0.0-38 kernel, and updating all pending packages. Log excerpts from the failed boot (journalctl -b -1 -k), relevant lines: “ACPI BIOS Error (bug): Attempt to CreateField of length zero” and “ACPI Error: Aborting method _SB.WMID.WQBC ...” followed by “hp_bioscfg: Returned error 0x3004”, with no kernel error recorded at the moment of the freeze. The log ends at 12:34:59 with a Wi-Fi warning, which suggests the freeze happens with no log output. I can attach the full output of journalctl -b -1 -k and lspci -k on request. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2172915/+subscriptions