Arch Linux

Mammut

Member

Registered: 2009-12-11

Posts: 23

Gummiboot and Kernel command line

Hi

I trying to change the mouse pulling rate to 2 ms using the Arch-wiki for “Mouse Polling Rate” and "gummiboot"

Before I used grub-legacy on a old pc and it worked fine adding

usbhid.mousepoll=2  to the kernel command line

however with gummiboot it does not work ?

/boot/loader/enties/Arch.conf

title          Arch Linux
linux      /vmlinuz-linux
initrd      /initramfs-linux.img
options     root=/dev/sdb2 rw usbhid.mousepoll=2

Is there a way to get the command line working ?

WonderWoofy

Member

From: Los Gatos, CA

Registered: 2012-05-19

Posts: 8,414

Re: Gummiboot and Kernel command line

The kernel command line works just fine if the machine boots.

I think you should try using the /etc/modprobe.d method, as that is the other way that module options can be specified. 

The way I see it, this way seems more appropriate for things like what you are trying to do.  The kernel command line I think should be used for built-in things, like acpi.  Though some things need to be specified on the kernel command line in order to make them actually work.  For example, the libahci module is set up to spin up drives one at a time in some kind of an attempt to efficiently use power.  So of course if you set this in /etc/modprobe.d, by the the time it gets to this setting, it will already be done, so you would use libahci.ignore_sss=1 on the kernel command line.

For more info, see the modprobe.d and modprobe man pages.

Mammut

Member

Registered: 2009-12-11

Posts: 23

Re: Gummiboot and Kernel command line

Thanks for your suggestion.

I'm also using the /etc/modprobe.d and (/etc/mkinitcpio.conf) method in trying to get it to work and if I do

$ cat /sys/module/usbhid/parameters/mousepoll
$ 2

It returns the value 2 suggesting the 500 Hz pulling rate, but the pull rate is still only 125 Hz when testing with evhz (and DirectX mouserate checker)

Last edited by Mammut (2013-09-02 16:07:44)

WonderWoofy

Member

From: Los Gatos, CA

Registered: 2012-05-19

Posts: 8,414

Re: Gummiboot and Kernel command line

I wonder if there is something going on at the userspace level that is trying to helpfully "fix" this for you… I don't know anything really about the polling rate of the usbhid module, but it might be something worth looking into.

BTW, why is it that you are in need of adjusting this parameter?  I'm not saying that you are wrong to do so or anything, but maybe if you gave some detail about what this change is trying to solve, then someone around here might know of a way to fix it.

Mammut

Member

Registered: 2009-12-11

Posts: 23

Re: Gummiboot and Kernel command line

125 Hz gives 8 ms delay on the mouse respond, where 500 Hz is down to 2 ms. The mouse feels more smooth when gaming with a pulling rate of the 500 Hz.