Views:
90
Votes: 0
✅ Solution
Tags:
dell
fan
overheating
grub
Link:
🔍 See Original Answer on Ask Ubuntu ⧉ 🔗
URL:
https://askubuntu.com/q/1541197
Title:
Dell Latitude 7490 Fan Overheating
ID:
/2025/02/11/Dell-Latitude-7490-Fan-Overheating
Created:
February 11, 2025
Upload:
April 21, 2025
Layout: post
TOC:
false
Navigation: false
Copy to clipboard: false
I found my Dell fans are quick to turn on when watching a video. After the video ends though the Dell fans are very slow to reduce speed. Never timed it but maybe five minutes to slow down?
$ sensors
dell_smm-virtual-0
Adapter: Virtual device
Processor Fan: 5200 RPM
Video Fan: 5000 RPM
CPU: +72.0°C
GPU: +73.0°C
SODIMM: +71.0°C
pch_skylake-virtual-0
Adapter: Virtual device
temp1: +93.5°C
coretemp-isa-0000
Adapter: ISA adapter
Package id 0: +80.0°C (high = +100.0°C, crit = +100.0°C)
Core 0: +78.0°C (high = +100.0°C, crit = +100.0°C)
Core 1: +80.0°C (high = +100.0°C, crit = +100.0°C)
Core 2: +69.0°C (high = +100.0°C, crit = +100.0°C)
Core 3: +66.0°C (high = +100.0°C, crit = +100.0°C)
Grub notes
My grub line has a bunch of stuff added over the years. Here is what it has now:
GRUB_CMDLINE_LINUX_DEFAULT=”noplymouth loglevel=3 fastboot acpiphp.disable=1 pcie_aspm=force vt.handoff=7 i915.fastboot=1 nopti nospectre_v2 nospec mem_sleep_default=deep nouveau.nomodeset=0 ipv6.disable_ipv6=1”
I found an older commented out line in my grub that relates to your screen freezing issue which I no longer use:
#GRUB_CMDLINE_LINUX_DEFAULT=”quiet loglevel=0 vga=current udev.log-priority=3 fastboot kaslr acpiphp.disable=1 i915.enable_rc6=0 i915.enable_psr=0 i915.preliminary_hw_support=1 i915.enable_hd_vgaarb=1 intel_idle.max_cstate=1 i915.enable_guc_loading=1 i915.enable_guc_submission pcie_aspm=force vt.handoff=7”
Because these screen freezing solutions of yours are no longer needed, I suspect the cause was due to outdated Nvidia drivers.
Finally, I found years of notes of various things tried inside of grub that aren’t used now. There might be something useful inside:
##################### June 29 2018 - Tuxkiller2 theme ##############################
GRUB_BACKGROUND="/usr/share/grub/themes/Tuxkiller2/1600x900-TuxRestingOnWindowsTB.png"
# Mar 3, 2021: Above is the "terminal box" which is clipped version of full
# screen version called "1600x900-TuxRestingOnWindows.jpg".
GRUB_THEME="/usr/share/grub/themes/Tuxkiller2/theme.txt"
GRUB_GFXMODE="1920x1080x32"
GRUB_GFXPAYLOAD_LINUX="keep"
GRUB_FONT="/usr/share/grub/themes/Tuxkiller2/ubuntu_regular_28.pf2"
# GRUB_TERMINAL="gfxterm"
#GRUB_CMDLINE_LINUX_DEFAULT="quiet splash i915.fastboot=1"
#GRUB_CMDLINE_LINUX_DEFAULT="noplymouth fastboot acpiphp.disable=1 pcie_aspm=force scsi_mod.use_blk_mq=1 vt.handoff=7 i915.enable_guc_loading=1 i915.enable_guc_submission=1 i915.edp_vswing=2 i915.enable_fbc=1 i915.fastboot=1 nopti nospectre_v2 nospec"
GRUB_CMDLINE_LINUX_DEFAULT="noplymouth loglevel=3 fastboot acpiphp.disable=1 pcie_aspm=force vt.handoff=7 i915.fastboot=1 nopti nospectre_v2 nospec mem_sleep_default=deep nouveau.nomodeset=0 ipv6.disable_ipv6=1"
# Jul 13/2019 - mem_sleep_default=deep from https://www.reddit.com/r/Dell/comments/8b6eci/xp_13_9370_battery_drain_while_suspended/
# Dec 27/2018 - intel_pstate=disable from: http://konkor.github.io/cpufreq/faq/#irqbalance-detected
# Dec 17/2018 - intel_pstate=no_hwp from: https://www.kernel.org/doc/html/v4.12/admin-guide/pm/intel_pstate.html
# Takes pstate frequency control from hardware to software
# Oct 8/2018 - Use scsi_mod.use_blk_mq=1 as per Ask Ubuntu to speed up NVMe:
# https://askubuntu.com/questions/698395/poor-io-performance-
# pcie-nvme-samsung-950-pro THIS ADDED A FEW SECONDS TO USERSPACE
# Aug 16/2018 - i915.edp_vswing=2 comes from Ask Ubuntu Dell XPS 15 9350 screen flickering:
# https://askubuntu.com/a/1064747/307523
# Aug 11/2018 - 10% performance boost eliminating Meltdown & Spectre support:
# "nopti nospectre_v2 nospec"
# Dec 13/2017 intel_iommu=igfx_off to fix rare error message related to virtualization which isn't used now.
# As per bug report: https://bbs.archlinux.org/viewtopic.php?id=176398 :
# DMAR: DRHD: handling fault status reg 2
# DMAR: [INTR-REMAP] Request device [f0:1f.0] fault
# Remove as boot went from 23 seconds to 46 seconds and screen flashed more
# November 27/2017 HDMI working with Nvidia drivers, but no sound so use hdmi-audio.service which requires
# early KMS to be off. Remove quiet & splash options for no plymouth.
# acpiphp.disable=1 to allow suspend to work with NVMe but disables hot plug.
# October 26/2017 HDMI isn't working but this isn't the cause of it. Try to update i915 drivers.
# pcie_aspm=force to get rid of syslog error message:
# ACPI FADT declares the system doesn't support PCIe ASPM, so disable it
# Also a web site says it adds 20 minutes battery life too.
# kaslr randomizes address space so same modules aren't in same memory location each boot.
# https://askubuntu.com/questions/32999/what-is-vt-handoff-7-parameter-in-grub-cfg
# nomodeset turns off "nouveau" drivers for nVidia card
# This doesn't remove additional drivers section as hopeed plus negative effect of screen
# going full bright at log in.
# loglevel=3 vga=current as per Arch Linux posting at:
# https://wiki.archlinux.org/index.php/silent_boot
# this should prevent messages still appearing twice when `quiet` is used.
# loglevel=3 udev.log-priority=3 as per Reddit posting at:
# https://www.reddit.com/r/archlinux/comments/4br86x/setting_up_plymouth_efi_framebuffer/d1briv2/
# Same link also notes to set plymouth delay to 0.
# i915.enable_rc6=0 Fix screen flickering Kernel's > 4.12 https://bbs.archlinux.org/viewtopic.php?id=211399
# i915.enable_psr=0 screen flickering kernel's > 4.6 https://wiki.archlinux.org/index.php/intel_graphics#Skylake_support
# GRUB_CMDLINE_LINUX="console=tty12" # Redirect the kernel output to another tty
# video=SVIDEO-1:d eliminate blank screen boot from above archlinux.org link.
# Skylake optimization: https://wiki.archlinux.org/index.php/intel_graphics
# i915.enable_guc_loading=1 i915.enable_guc_submission=1