** Description changed: - Summary: System-wide Power Management failure on ASUS Z790 + NVIDIA RTX - 4070 Ti, leading to hard lockups, non-functional USB-C ports, and - display recovery failure. + SUMMARY: Hard freeze on Suspend, DP link loss after monitor power cycle, + and non-functional USB-C (INT3515 IRQ error) on ASUS Z790 + RTX 4070 Ti + and display recovery failure + Environment: OS: Ubuntu 26.04 "Resolute Raccoon" (Development Branch) Kernel: 6.19.0-9-generic Motherboard: ASUS ROG MAXIMUS Z790 HERO (BIOS 3001) GPU: NVIDIA GeForce RTX 4070 Ti (Driver: 580.126.09) Secure Boot: Enabled (Kernel Lockdown active) Symptoms: Hard Lockup: System freezes instantly when attempting to Suspend or Hibernate. Requires physical hard reset. Display Recovery Failure: If the monitor is manually turned OFF and back ON (or switched to another input), the screen remains black. SSH access remains functional, confirming a GPU/Driver hang rather than a kernel panic. USB-C Failure: All USB Type-C ports are non-functional in Ubuntu. UI Regression: The 'Suspend' option is often missing or unresponsive in the GNOME power menu. Technical Root Causes Found: UCSI / IRQ Conflict: The kernel log shows a critical failure in the serial bus driver: Serial bus multi instantiate pseudo device driver INT3515:00: error -ENXIO: IRQ index 1 not found. This appears to be the root cause, as the UCSI (USB Type-C Connector System Software Interface) is tied to the system's power state transitions. EDID Mismatch: While the monitor is active, cat /sys/class/drm/card1-DP-1/edid returns 0 bytes. However, valid EDID data (384 bytes) was found on card1-DP-3. This suggests a mapping regression between physical ports and logical DRM outputs. Lockdown Interference: Kernel Lockdown restricts hibernation, but the system fails to handle this restriction gracefully, leading to a freeze instead of a denied request. Evidence of Regression: Dual-Boot Verification: All hardware (USB-C ports, Suspend/Resume, DisplayPort link) works perfectly on Windows on the same machine. This confirms the hardware is functional and the issue is strictly a Linux kernel/driver regression. NVIDIA Tooling Failure: nvidia-settings is non-functional under Wayland/Kernel 6.19, returning multiple "Bad handle" errors, preventing standard diagnostic procedures. Steps to Reproduce: Boot into Ubuntu with Secure Boot active. Turn the monitor OFF and then ON via the physical power button (causes Black Screen). OR attempt to Suspend via terminal/UI (causes Hard Freeze). Attached Logs: nvidia-bug-report.log.gz (Detailed GPU/Driver state) acpidump.txt (ACPI tables for ASUS Z790) /proc/interrupts (Showing the IRQ 1 conflict) + + + Scenario A: Immediate Hard Freeze (Suspend/Hibernate) + + Ensure Secure Boot is enabled in BIOS (Kernel Lockdown active). + + Attempt to trigger a power state transition by running: + sudo systemctl suspend (or use the GNOME Power Menu). + + Actual Result: The system freezes instantly. No disk activity, no + keyboard response (Caps Lock doesn't toggle). A hard reset is required. + + Expected Result: The system should enter a low-power state or + gracefully deny the request if Lockdown prevents it. + + Scenario B: Permanent Black Screen (Display Link Loss) + + Boot into a Wayland session with the monitor connected via + DisplayPort. + + Turn the monitor OFF using its physical power button. + + Wait 10 seconds and turn the monitor ON. + + Actual Result: The screen remains black. No signal is detected by + the monitor. + + Verification via SSH: From a remote machine, run nvidia-smi. The GPU + is still reported as "On" and processes are running, but the display + link is broken. + + Expected Result: The monitor should re-initialize and show the + desktop immediately.
** Description changed: SUMMARY: Hard freeze on Suspend, DP link loss after monitor power cycle, and non-functional USB-C (INT3515 IRQ error) on ASUS Z790 + RTX 4070 Ti and display recovery failure - Environment: OS: Ubuntu 26.04 "Resolute Raccoon" (Development Branch) Kernel: 6.19.0-9-generic Motherboard: ASUS ROG MAXIMUS Z790 HERO (BIOS 3001) GPU: NVIDIA GeForce RTX 4070 Ti (Driver: 580.126.09) Secure Boot: Enabled (Kernel Lockdown active) Symptoms: Hard Lockup: System freezes instantly when attempting to Suspend or Hibernate. Requires physical hard reset. Display Recovery Failure: If the monitor is manually turned OFF and back ON (or switched to another input), the screen remains black. SSH access remains functional, confirming a GPU/Driver hang rather than a kernel panic. USB-C Failure: All USB Type-C ports are non-functional in Ubuntu. UI Regression: The 'Suspend' option is often missing or unresponsive in the GNOME power menu. Technical Root Causes Found: UCSI / IRQ Conflict: The kernel log shows a critical failure in the serial bus driver: Serial bus multi instantiate pseudo device driver INT3515:00: error -ENXIO: IRQ index 1 not found. This appears to be the root cause, as the UCSI (USB Type-C Connector System Software Interface) is tied to the system's power state transitions. EDID Mismatch: While the monitor is active, cat /sys/class/drm/card1-DP-1/edid returns 0 bytes. However, valid EDID data (384 bytes) was found on card1-DP-3. This suggests a mapping regression between physical ports and logical DRM outputs. Lockdown Interference: Kernel Lockdown restricts hibernation, but the system fails to handle this restriction gracefully, leading to a freeze instead of a denied request. Evidence of Regression: Dual-Boot Verification: All hardware (USB-C ports, Suspend/Resume, DisplayPort link) works perfectly on Windows on the same machine. This confirms the hardware is functional and the issue is strictly a Linux kernel/driver regression. NVIDIA Tooling Failure: nvidia-settings is non-functional under Wayland/Kernel 6.19, returning multiple "Bad handle" errors, preventing standard diagnostic procedures. Steps to Reproduce: Boot into Ubuntu with Secure Boot active. Turn the monitor OFF and then ON via the physical power button (causes Black Screen). OR attempt to Suspend via terminal/UI (causes Hard Freeze). Attached Logs: nvidia-bug-report.log.gz (Detailed GPU/Driver state) acpidump.txt (ACPI tables for ASUS Z790) /proc/interrupts (Showing the IRQ 1 conflict) + + Scenario A: Immediate Hard Freeze (Suspend/Hibernate) - Ensure Secure Boot is enabled in BIOS (Kernel Lockdown active). + Ensure Secure Boot is enabled in BIOS (Kernel Lockdown active). - Attempt to trigger a power state transition by running: - sudo systemctl suspend (or use the GNOME Power Menu). + Attempt to trigger a power state transition by running: + sudo systemctl suspend (or use the GNOME Power Menu). - Actual Result: The system freezes instantly. No disk activity, no + Actual Result: The system freezes instantly. No disk activity, no keyboard response (Caps Lock doesn't toggle). A hard reset is required. - Expected Result: The system should enter a low-power state or + Expected Result: The system should enter a low-power state or gracefully deny the request if Lockdown prevents it. Scenario B: Permanent Black Screen (Display Link Loss) - Boot into a Wayland session with the monitor connected via + Boot into a Wayland session with the monitor connected via DisplayPort. - Turn the monitor OFF using its physical power button. + Turn the monitor OFF using its physical power button. - Wait 10 seconds and turn the monitor ON. + Wait 10 seconds and turn the monitor ON. - Actual Result: The screen remains black. No signal is detected by + Actual Result: The screen remains black. No signal is detected by the monitor. - Verification via SSH: From a remote machine, run nvidia-smi. The GPU + Verification via SSH: From a remote machine, run nvidia-smi. The GPU is still reported as "On" and processes are running, but the display link is broken. - Expected Result: The monitor should re-initialize and show the + Expected Result: The monitor should re-initialize and show the desktop immediately. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2144584 Title: Multiple PM Regressions on ASUS Z790/RTX 4070 Ti: Suspend freeze, UCSI (INT3515) IRQ failure, and Display recovery hang To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2144584/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
