[Bug 2172182] Re: MSI Prestige 14H B12UCX: I2C-HID touchpad (MSNB0001:00 06CB:CEBD) stops after a few seconds; only stays alive with NVIDIA dGPU forced on

** 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/2172182 Title: MSI Prestige 14H B12UCX: I2C-HID touchpad (MSNB0001:00 06CB:CEBD) stops after a few seconds; only stays alive with NVIDIA dGPU forced on Status in linux package in Ubuntu: New Bug description: Laptop: MSI Prestige 14H B12UCX BIOS: E14F1IMS.11E (also reproduced on E14F1IMS.117) OS: Ubuntu 26.04.1 LTS, kernel 7.0.0-38-generic (also 7.0.0-30) Touchpad: Synaptics I2C-HID, MSNB0001:00 06CB:CEBD, i2c_designware.0 (PCI 00:15.0) GPU: Intel Iris Xe + NVIDIA RTX 2050 (proprietary driver 595) Problem: The touchpad works for a few seconds after boot, then stops responding. It briefly works again after plugging/unplugging the charger or opening a fresh terminal, then stops again. The same touchpad works fine in Windows 11 on this laptop (dual boot). Behaviour by graphics mode (prime-select): - on-demand: works for a few seconds, then dies - intel (dGPU off): touchpad completely dead - nvidia (dGPU always on): touchpad stays alive (only workaround found) Observations when the touchpad is dead: - The kernel and libinput still list the touchpad device - No events from libinput debug-events - /proc/interrupts: the MSNB0001:00 IRQ count does not increase when touching the pad - Reading /dev/hidraw0 returns no data - No errors in dmesg at boot (hid-multitouch binds normally) - Unbind/bind of i2c_hid_acpi fails after it dies: "tigerlake-pinctrl INTC1055:00: pin 62 cannot be used as IRQ" "i2c_hid_acpi i2c-MSNB0001:00: Could not register for MSNB0001:00 interrupt" Things that did NOT help: - BIOS update to E14F1IMS.11E - Forcing runtime PM to "on" for the I2C device, i2c_designware.0 and PCI 00:15.0 - CPU load, and disabling deep C-states (cpuidle state2+) - Reloading i2c_hid_acpi / hid_multitouch modules Similar reports on this model: touchpad dying after ~5-15 seconds on openSUSE, Mint, Fedora and Ubuntu. ProblemType: Bug DistroRelease: Ubuntu 26.04 Package: linux-image-7.0.0-38-generic 7.0.0-38.38 ProcVersionSignature: Ubuntu 7.0.0-38.38-generic 7.0.14 Uname: Linux 7.0.0-38-generic x86_64 ApportVersion: 2.34.1-0ubuntu0.1 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: lmnotsmurfing 3694 F.... pipewire lmnotsmurfing 3702 F.... wireplumber /dev/snd/seq: lmnotsmurfing 3694 F.... pipewire CasperMD5CheckResult: pass CurrentDesktop: ubuntu:GNOME Date: Sun Oct 25 20:33:13 2026 InstallationDate: Installed on 2026-10-23 (2 days ago) InstallationMedia: Ubuntu 26.04.1 LTS "Resolute Raccoon" - Release amd64 (20260826) MachineType: Micro-Star International Co., Ltd. Prestige 14H B12UCX ProcEnviron: LANG=en_US.UTF-8 PATH=(custom, no user) SHELL=/bin/bash TERM=xterm-256color XDG_RUNTIME_DIR=<set> ProcFB: 0 i915drmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-7.0.0-38-generic root=UUID=c916bbf7-72f4-43fc-96a4-d7d7bf356842 ro quiet splash crashkernel=2G-4G:320M,4G-32G:512M,32G-64G:1024M,64G-128G:2048M,128G-:4096M SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 03/28/2024 dmi.bios.release: 1.30 dmi.bios.vendor: American Megatrends International, LLC. dmi.bios.version: E14F1IMS.11E dmi.board.asset.tag: Default string dmi.board.name: MS-14F1 dmi.board.vendor: Micro-Star International Co., Ltd. dmi.board.version: REV:1.0 dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 10 dmi.chassis.vendor: Micro-Star International Co., Ltd. dmi.chassis.version: N/A dmi.modalias: dmi:bvnAmericanMegatrendsInternational,LLC.:bvrE14F1IMS.11E:bd03/28/2024:br1.30:svnMicro-StarInternationalCo.,Ltd.:pnPrestige14HB12UCX:pvrREV1.0:rvnMicro-StarInternationalCo.,Ltd.:rnMS-14F1:rvrREV1.0:cvnMicro-StarInternationalCo.,Ltd.:ct10:cvrN/A:sku14F1.1:pfaPrestige: dmi.product.family: Prestige dmi.product.name: Prestige 14H B12UCX dmi.product.sku: 14F1.1 dmi.product.version: REV:1.0 dmi.sys.vendor: Micro-Star International Co., Ltd. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2172182/+subscriptions