Public bug reported:
Hardware: Dell XPS 13 9345 (Snapdragon X Elite), Ubuntu on arm64, kernel
7.3.0-9-generic.
Problem: The fan's state is set only at power-on and never changes
afterward. If it boots with the fan off, it stays off while the laptop
gets very hot. If it's on, it stays on. Only a full power cycle changes
it.
Details:
- lm-sensors shows all the CPU/GPU/NSP thermal zones reading normally, but no
fan device or fan control is exposed at all.
- It looks like the embedded controller isn't getting thermal or system-state
updates from the OS, so it never changes fan speed after boot. This doesn't
happen on Windows.
- Firmware is up to date per fwupd.
Expected: Fan speed follows temperature, like it does on Windows.
ProblemType: Bug
DistroRelease: Ubuntu 26.10
Package: linux-image-7.3.0-9-generic 7.3.0-9.9
ProcVersionSignature: Ubuntu 7.3.0-9.9-generic 7.3.0-rc6
Uname: Linux 7.3.0-9-generic aarch64
ApportVersion: 2.36.0-0ubuntu1
Architecture: arm64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: tyler-wilson 4070 F.... pipewire
tyler-wilson 4309 F.... wireplumber
/dev/snd/pcmC0D1p: tyler-wilson 4070 F...m pipewire
/dev/snd/seq: tyler-wilson 4070 F.... pipewire
CasperMD5CheckResult: pass
CurrentDesktop: ubuntu:GNOME
Date: Sat Oct 24 13:31:31 2026
InstallationDate: Installed on 2026-10-21 (4 days ago)
InstallationMedia: Ubuntu 26.10 "Stonking Stingray" - Official arm64 (20261010)
Lspci-vt:
-[0004:00]---00.0-[01-ff]----00.0 Qualcomm Technologies, Inc WCN785x Wi-Fi
7(802.11be) 320MHz 2x2 [FastConnect 7800]
-[0006:00]---00.0-[01-ff]----00.0 Sandisk Corp PC SN740 NVMe SSD (DRAM-less)
MachineType: Dell Inc. XPS 13 9345
ProcEnviron:
LANG=en_US.UTF-8
PATH=(custom, no user)
SHELL=/bin/bash
TERM=xterm-256color
XDG_RUNTIME_DIR=<set>
ProcFB: 0 msmdrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-7.3.0-9-generic
root=UUID=e94cd5a5-df71-4514-937a-b32bdcfffc7b ro clk_ignore_unused
pd_ignore_unused cma=128M efi=noruntime quiet splash console=tty0
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)
acpidump:
dmi.bios.date: 07/ 9/2026
dmi.bios.release: 2.14
dmi.bios.vendor: Dell Inc.
dmi.bios.version: 2.14.0
dmi.board.name: 0KY77V
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 10
dmi.chassis.vendor: Dell Inc.
dmi.modalias:
dmi:bvnDellInc.:bvr2.14.0:bd07/9/2026:br2.14:svnDellInc.:pnXPS139345:pvr:rvnDellInc.:rn0KY77V:rvrA00:cvnDellInc.:ct10:cvr:sku0C69:pfaXPS:
dmi.product.family: XPS
dmi.product.name: XPS 13 9345
dmi.product.sku: 0C69
dmi.sys.vendor: Dell Inc.
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: apport-bug arm64 stonking wayland-session
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https://bugs.launchpad.net/bugs/2172131
Title:
XPS 13 9345 (Snapdragon X Elite): fan state fixed at boot, never
adjusts until power cycle
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