** 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/2144584
Title:
Multiple PM Regressions on ASUS Z790/RTX 4070 Ti: Suspend freeze, UCSI
(INT3515) IRQ failure, and Display recovery hang
Status in linux package in Ubuntu:
New
Bug description:
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.
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2144584/+subscriptions
Комментариев нет:
Отправить комментарий