I Also Tested this on many Dell pc's And it Worked also. Freeware software Developed ages ago and being a Electronics engineer who mainly work on Dell Equipment has Found this Application a Lifesaver Especially for the Laptop's with High End gpu's etc. Many dell user's must of heard of a Application called i8kfangui Link. Normal pwm control should be in /sys/devices/virtual/hwmon/hwmon*/pwm1 without any special configuration (more details on that in the module docs linked above)ĮDIT: Got so many small bits wrong that this is 6th iteration of this comment but now it should be correct.I checked for a similar thread as i this one i have created and found none but to be Very Useful for the Users of Dell Laptops !.,Ĭooling is a Major issue with them myself being a Engineer on Hardware and software Even a novice know's Keeping Gpu's & Cpu's And the Northbridge etc cooler is Better for the lifespan of your Device. With the security modules enabled user-space programs cannot do fan control via ioperm mechanisms so you can submit a patch to the dell-smm-hwmon kernel module to whitelist pwm toggle command (more details in the link at kernel documentation). The early LSM modules are initialized unconditionally before parsing kernel cmdline. If you have CONFIG_SECURITY_LOCKDOWN_LSM_EARLY=y config ( zgrep LOCKDOWN /proc/config.gz) then you need to try out with another kernel or change your kernel config to disable it and rebuild. Just remember to put those back on when done with testing. Easiest way to disable those is by adding lsm= security= ( docs and lockdown enabling logic) settings to your kernel cmdline. Ioperm is also disabled by AppArmor default settings and lockdown (search ioperm to find relevant parts in both man pages).
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