Comments on: Enable Dell’s volume knob under linux http://ejohansson.se/archives/2006/05/23/enable-dells-volume-knob-under-linux/ Random bits about Linux, programming, computers and occasionally other stuff. Mon, 11 Jan 2010 12:38:16 +0000 hourly 1 http://wordpress.org/?v=3.0 By: erik http://ejohansson.se/archives/2006/05/23/enable-dells-volume-knob-under-linux/comment-page-1/#comment-1145 erik Fri, 22 Feb 2008 19:53:45 +0000 http://ejohansson.se/archives/2006/05/23/enable-dells-volume-knob-under-linux/#comment-1145 Sven: Glad you like dellknob. To use the initscript you need to copy dellknob to /usr/sbin, dellknob-debian-default to /etc/default/dellknob and dellknob-debian to /etc/init.d/dellknob (make sure it's executable). Then run "update-rc.d -n dellknob defaults" to set up the required symlinks in /etc/rc*.d. Sven:

Glad you like dellknob. To use the initscript you need to copy dellknob to /usr/sbin, dellknob-debian-default to /etc/default/dellknob and dellknob-debian to /etc/init.d/dellknob (make sure it’s executable). Then run “update-rc.d -n dellknob defaults” to set up the required symlinks in /etc/rc*.d.

]]> By: Sven http://ejohansson.se/archives/2006/05/23/enable-dells-volume-knob-under-linux/comment-page-1/#comment-1143 Sven Fri, 08 Feb 2008 19:38:25 +0000 http://ejohansson.se/archives/2006/05/23/enable-dells-volume-knob-under-linux/#comment-1143 Hi Erik, I'm happily using your utility for almost a year now and also made the recent update. Unfortunately I'm not very firm with init and always started it manually - which annoys me by now. So I started editing the inittab but wasn't certain about it and found dellknob-debian from gringer. Which appears to be what I want since it says something about init. But I have no idea what to do with it. Could you please tell someone who's well used to codes and editors but not familiar with the insides of Linux what to do or point me to the appropriate location. regards, Sven Hi Erik,

I’m happily using your utility for almost a year now and also made the recent update. Unfortunately I’m not very firm with init and always started it manually – which annoys me by now.
So I started editing the inittab but wasn’t certain about it and found dellknob-debian from gringer. Which appears to be what I want since it says something about init. But I have no idea what to do with it.
Could you please tell someone who’s well used to codes and editors but not familiar with the insides of Linux what to do or point me to the appropriate location.

regards, Sven

]]> By: erik http://ejohansson.se/archives/2006/05/23/enable-dells-volume-knob-under-linux/comment-page-1/#comment-1144 erik Sun, 30 Dec 2007 13:33:58 +0000 http://ejohansson.se/archives/2006/05/23/enable-dells-volume-knob-under-linux/#comment-1144 Sorry for taking such a long time to respond. The code is now here: http://git.ejohansson.se/?p=dellknob.git;a=summary Sorry for taking such a long time to respond.

The code is now here: http://git.ejohansson.se/?p=dellknob.git;a=summary

]]> By: Patrick Bogen http://ejohansson.se/archives/2006/05/23/enable-dells-volume-knob-under-linux/comment-page-1/#comment-1141 Patrick Bogen Thu, 13 Dec 2007 20:01:15 +0000 http://ejohansson.se/archives/2006/05/23/enable-dells-volume-knob-under-linux/#comment-1141 http://wiki.ejohansson.se/index.php/Software/knob is now a broken link. Is there somewhere else to find the code? http://wiki.ejohansson.se/index.php/Software/knob is now a broken link. Is there somewhere else to find the code?

]]> By: Will http://ejohansson.se/archives/2006/05/23/enable-dells-volume-knob-under-linux/comment-page-1/#comment-1135 Will Wed, 12 Dec 2007 17:19:42 +0000 http://ejohansson.se/archives/2006/05/23/enable-dells-volume-knob-under-linux/#comment-1135 WikiErik link is dead. WikiErik link is dead.

]]> By: Knobby http://ejohansson.se/archives/2006/05/23/enable-dells-volume-knob-under-linux/comment-page-1/#comment-1142 Knobby Wed, 28 Nov 2007 01:47:06 +0000 http://ejohansson.se/archives/2006/05/23/enable-dells-volume-knob-under-linux/#comment-1142 knob link returns 404 knob link returns 404

]]> By: 谢 骋 的 网 志 » Enable volume knob on XMod USB sound card under Linux console environment http://ejohansson.se/archives/2006/05/23/enable-dells-volume-knob-under-linux/comment-page-1/#comment-1136 谢 骋 的 网 志 » Enable volume knob on XMod USB sound card under Linux console environment Thu, 18 Oct 2007 18:42:32 +0000 http://ejohansson.se/archives/2006/05/23/enable-dells-volume-knob-under-linux/#comment-1136 [...] I use MPD on a Ubuntu Linux box to play my mp3 collection during work. I always had problem of fully using my XMod USB sound card under Linux. Under WinXP, its big knob works like a charm - adjusting volume reliably, without needing any special driver to be installed. It’s another story with Linux though. Ubuntu has no problem detecting XMod and making it sound. But that’s it, the volume knob became useless. I have been looking for a solution for a while. So far, I have had no luck until yesterday I saw this excellent little program Knob created by Erik Johansson. Apparently, Erik did it to solve this DELL USB keyboard problem. But it can be easily adjusted to fit my needs here. So I took Erik’s original source and made some modification, created a new program called ‘Xmod_Knob’. What it does is to read events generated from XMod’s knob from /dev/input/event# queue, and then adjust volume accordingly (using ‘amixer’ program). Erik’s version converts knob events into key strokes. It works for a GUI desktop, but not for me, simply because I don’t use GUI that much. So I decided to make the program call ALSA volume control problem - amixer directly. It turned out to be a successful solution. For all other XMod owner out there, you can download xmod_knob.c from my site. It is a simple piece of work and is self-explain. Mail me if you have difficulties compiling it. [...] [...] I use MPD on a Ubuntu Linux box to play my mp3 collection during work. I always had problem of fully using my XMod USB sound card under Linux. Under WinXP, its big knob works like a charm – adjusting volume reliably, without needing any special driver to be installed. It’s another story with Linux though. Ubuntu has no problem detecting XMod and making it sound. But that’s it, the volume knob became useless. I have been looking for a solution for a while. So far, I have had no luck until yesterday I saw this excellent little program Knob created by Erik Johansson. Apparently, Erik did it to solve this DELL USB keyboard problem. But it can be easily adjusted to fit my needs here. So I took Erik’s original source and made some modification, created a new program called ‘Xmod_Knob’. What it does is to read events generated from XMod’s knob from /dev/input/event# queue, and then adjust volume accordingly (using ‘amixer’ program). Erik’s version converts knob events into key strokes. It works for a GUI desktop, but not for me, simply because I don’t use GUI that much. So I decided to make the program call ALSA volume control problem – amixer directly. It turned out to be a successful solution. For all other XMod owner out there, you can download xmod_knob.c from my site. It is a simple piece of work and is self-explain. Mail me if you have difficulties compiling it. [...]

]]> By: Tor Arne http://ejohansson.se/archives/2006/05/23/enable-dells-volume-knob-under-linux/comment-page-1/#comment-1137 Tor Arne Sat, 06 Oct 2007 18:25:29 +0000 http://ejohansson.se/archives/2006/05/23/enable-dells-volume-knob-under-linux/#comment-1137 Thank you so much for this!!! I've been struggling for hours with the Xorg config trying various configurations with an extra InputDevice pointed at /dev/input/event5: http://www.df.lth.se/~triad/krad/linuxinstall.php This is the perfect solution! I haven't tried this, but I suppose you can use the following tricks to make the inputs readable by the user, and so your tool can be started by the user too: http://ben.timby.com/?page_id=37 Thanks! Thank you so much for this!!! I’ve been struggling for hours with the Xorg config trying various configurations with an extra InputDevice pointed at /dev/input/event5:

http://www.df.lth.se/~triad/krad/linuxinstall.php

This is the perfect solution!

I haven’t tried this, but I suppose you can use the following tricks to make the inputs readable by the user, and so your tool can be started by the user too:

http://ben.timby.com/?page_id=37

Thanks!

]]> By: Jason http://ejohansson.se/archives/2006/05/23/enable-dells-volume-knob-under-linux/comment-page-1/#comment-1138 Jason Sun, 19 Aug 2007 15:28:52 +0000 http://ejohansson.se/archives/2006/05/23/enable-dells-volume-knob-under-linux/#comment-1138 Hi I've used this keyboard in XP and the volume knob is MUCH more precise than when running under 'knob' in linux. With knob, you really have to crank on the dial to get any on screen response in linux, but with xp, every notch dials the volume slider appropriately. Damn dell...Cheers! Jason Hi
I’ve used this keyboard in XP and the volume knob is MUCH more precise than when running under ‘knob’ in linux. With knob, you really have to crank on the dial to get any on screen response in linux, but with xp, every notch dials the volume slider appropriately. Damn dell…Cheers!

Jason

]]> By: Rick http://ejohansson.se/archives/2006/05/23/enable-dells-volume-knob-under-linux/comment-page-1/#comment-1139 Rick Mon, 30 Jul 2007 22:08:21 +0000 http://ejohansson.se/archives/2006/05/23/enable-dells-volume-knob-under-linux/#comment-1139 Erik, thanks for writing this, it was very helpful in getting the volume to work. In response to Allen's comment above, I noticed that once I turn the knob in one direction it will not output anymore events in that direction until I reverse direction. But depending on how fast I turn the knob, I can increase a lot or little. Thanks, Rick Erik, thanks for writing this, it was very helpful in getting the volume to work.

In response to Allen’s comment above, I noticed that once I turn the knob in one direction it will not output anymore events in that direction until I reverse direction. But depending on how fast I turn the knob, I can increase a lot or little.

Thanks,
Rick

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