As the question says it all, I would just like to elaborate with an example:


This is an option for i915 module or intel video driver. So is there any way to know or list something like i915_enable_rc6 is an option for i915 from linux commandline ?

I hope I am clear with the question ?

Edit: I was referring to i915 just for example and nothing else. modinfo seems to be the command I was looking for.

3 Answers 3


modinfo does it:

modinfo i915 | grep '^parm:'

For open source modules the most reliable way is to look at the source. You don't need to be a kernel developer.

See source for i915.

  • If there is no section called parm in the modinfo output does that mean there is no options to configure the modules? Aug 30, 2011 at 9:37
  • Mostly it means that author wanted to keep it as a non-visible parameter for some reason. See updated post. Aug 30, 2011 at 12:11
  • the link is broken
    – glS
    Aug 8, 2020 at 15:34

You can find all the applicable i915 kernel params applicable for your card using a command such as

sudo grep -H '' /sys/module/i915/parameters/*


sudo grep . /sys/module/i915/parameters/*

(thanks @arrange)

In my case I can potentially use:


If no parameters are identified then either that is a true statement - or the kernel is loading a different kernel module than you were expecting:

 sudo lshw -c display

       description: VGA compatible controller
       product: Core Processor Integrated Graphics Controller
       vendor: Intel Corporation
       physical id: 2
       bus info: pci@0000:00:02.0
       version: 18
       width: 64 bits
       clock: 33MHz
       capabilities: msi pm vga_controller bus_master cap_list rom
       configuration: driver=i915 latency=0
       resources: irq:41 memory:90000000-903fffff memory:80000000-8fffffff ioport:3050(size=8)

In the above trace you can see in the configuration line "driver=i915" that the kernel sees the video card and has loaded the i915 module.


  • 1
    +1. I'd just simplify the command to sudo grep . /sys/module/i915/parameters/*
    – arrange
    Aug 29, 2011 at 19:17
  • I was referring to i915 because its mostly used. But the path information was something I didn't know, so if there is no parameters folder in the /sys/module/{module_name}/ Does that mean the specific module doesnot have options to tweak ? Aug 30, 2011 at 4:23
  • @sagarchalise - have updated with an explanation
    – fossfreedom
    Aug 30, 2011 at 6:43

Perhaps this is an newer modinfo options, but modinfo support listing only the parameters:

$ modinfo -p i915


$ modinfo --parameters i915

Note: the $ sign is just the prompt display. It shows that the command can be run as a non-root user and without sudo.

It is possible to also check the current parameters of an already loaded modules using systool:

systool is part of the sysfsutils package. Install it with this command

sudo apt-get install sysfsutils

Then use it this way

$ systool -v -m i915

In the output of this command check the "Parameters:" section.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.