apport information
** Tags added: apport-collected stonking wayland-session
** Description changed:
Dell XPS 15 9530, hybrid Intel Iris Xe + RTX 4070 Laptop (AD106M),
Ubuntu 26.10, nvidia 615.71.09 (open, from the archive), GNOME/Wayland,
PRIME on-demand, display on the iGPU.
Same driver, same DKMS build, same config, only the kernel differs:
7.3.0-8-generic:
/proc/driver/nvidia/gpus/0000:01:00.0/power
Runtime D3 status: Not supported
Video Memory: Active
power/runtime_status = active
power/runtime_suspended_time = 0 (across full uptime, every boot)
7.0.0-38-generic:
/proc/driver/nvidia/gpus/0000:01:00.0/power
Runtime D3 status: Enabled (fine-grained)
Video Memory: Off
power/runtime_status = suspended
power/runtime_suspended_time = 24769
Every documented RTD3 requirement is satisfied on both kernels:
- Ada GPU (newer than the Turing minimum)
- CONFIG_PM=y, CONFIG_PCIE_PME=y
- ACPI _PR3 present: \_SB_.PC00.PEG1.PG01 "New power resource";
power_resources_D3hot present on the parent bridge 0000:00:01.0
- d3cold_allowed=1 on bridge and GPU
- NVreg_DynamicPowerManagement=0x02, set by Ubuntu's own
/usr/lib/modprobe.d/nvidia-runtimepm.conf
- no displays on the dGPU (no card2-* connectors)
- platform ships a dedicated RTD3 ACPI table:
ACPI: SSDT (v02 DELL DellRtd3 00001000 INTL 20200717)
So on 7.3 the driver declines RTD3 on a platform that meets every
requirement and that demonstrably works on 7.0.
Impact: the dGPU is pinned in D0 permanently — constant idle power draw
and heat on battery.
Likely the same regression as CachyOS/linux-cachyos#1053, where 7.2.6
reported "Enabled (fine-grained)" and 7.3.0-rc3 reported "Not supported".
That reporter believed it was CachyOS-specific; this reproduces on
Ubuntu's own 7.3.0-8-generic, so it is not. Combining both data points
puts the regression window at 7.2.6 -> 7.3.0-rc3.
Not reproducible on 7.0.0-38-generic. I have no 7.1/7.2 kernels installed
to narrow it further locally, but can test builds on request.
+ ---
+ ProblemType: Bug
+ ApportVersion: 2.36.0-0ubuntu1
+ Architecture: amd64
+ AudioDevicesInUse:
+ USER PID ACCESS COMMAND
+ /dev/snd/controlC0: loris 5522 F.... pipewire
+ loris 5526 F.... wireplumber
+ /dev/snd/seq: loris 5522 F.... pipewire
+ CasperMD5CheckResult: pass
+ CurrentDesktop: ubuntu:GNOME
+ DistroRelease: Ubuntu 26.10
+ InstallationDate: Installed on 2023-11-21 (1049 days ago)
+ InstallationMedia: Ubuntu 23.10.1 "Mantic Minotaur" - Release amd64
(20231016.1)
+ MachineType: Dell Inc. XPS 15 9530
+ Package: linux (not installed)
+ ProcEnviron:
+ LANG=fr_FR.UTF-8
+ PATH=(custom, no user)
+ SHELL=/bin/bash
+ TERM=xterm-256color
+ XDG_RUNTIME_DIR=<set>
+ ProcFB: 0 i915drmfb
+ ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-7.3.0-8-generic
root=/dev/mapper/ubuntu--vg-ubuntu--lv ro quiet splash
crashkernel=2G-4G:320M,4G-32G:512M,32G-64G:1024M,64G-128G:2048M,128G-:4096M
+ ProcVersionSignature: Ubuntu 7.3.0-8.8-generic 7.3.0-rc5
+ Tags: stonking wayland-session
+ Uname: Linux 7.3.0-8-generic x86_64
+ UpgradeStatus: Upgraded to stonking on 2026-10-04 (1 days ago)
+ UserGroups: adm cdrom dip docker lpadmin plugdev sudo users
+ _MarkForUpload: True
+ dmi.bios.date: 11/11/2024
+ dmi.bios.release: 1.18
+ dmi.bios.vendor: Dell Inc.
+ dmi.bios.version: 1.18.0
+ dmi.board.name: 0PHRDD
+ dmi.board.vendor: Dell Inc.
+ dmi.board.version: A00
+ dmi.chassis.type: 10
+ dmi.chassis.vendor: Dell Inc.
+ dmi.ec.firmware.release: 1.7
+ dmi.modalias:
dmi:bvnDellInc.:bvr1.18.0:bd11/11/2024:br1.18:efr1.7:svnDellInc.:pnXPS159530:pvr:rvnDellInc.:rn0PHRDD:rvrA00:cvnDellInc.:ct10:cvr:sku0BEB:pfaXPS:
+ dmi.product.family: XPS
+ dmi.product.name: XPS 15 9530
+ dmi.product.sku: 0BEB
+ dmi.sys.vendor: Dell Inc.
** Attachment added: "AlsaInfo.txt"
https://bugs.launchpad.net/bugs/2169505/+attachment/6005813/+files/AlsaInfo.txt
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https://bugs.launchpad.net/bugs/2169505
Title:
NVIDIA dGPU never enters RTD3 on kernel 7.3.0; works on 7.0.0
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