From mboxrd@z Thu Jan 1 00:00:00 1970 From: c.a.subramaniam@gmail.com (Subramaniam Appadodharana) Date: Fri, 11 Apr 2014 11:29:54 -0500 Subject: Run a program when DP monitor is plugged in/out In-Reply-To: References: Message-ID: To: kernelnewbies@lists.kernelnewbies.org List-Id: kernelnewbies.lists.kernelnewbies.org Hi Arun, Yes I think you can use uevent. Since it is a DP monitor, and it has an associated driver, it should have an associated sysfs entry? You can send a uevent to the dev node within the sysfs. I havent used this myself except for request_firmware(). https://www.kernel.org/doc/pending/hotplug.txt On Fri, Apr 11, 2014 at 10:46 AM, pramod gurav wrote: > Hi Arun, > > If it is just an event you want to send across to user space how about > kernel input sub system. Your userspace can poll on the input device node. > Once the event is received from kernel it can launch a script or do what > you say you want to do. > > > On Fri, Apr 11, 2014 at 6:49 PM, arun c wrote: > >> Hi, >> >> I want to run a program when DP monitor is plugged in/out. >> My linux kernel ( 3.14.0-00348-gbfcbf45) gets an interrupt when DP cable >> is removed or inserted. >> From the graphics driver interrupt handler I can differentiate the two >> events. >> >> I want to run a user space program when this removal/insertion happens. >> What are the possible >> ways to achieve this? >> >> when I google for this I am seeing examples related to udev(How to run a >> script when a usb device is inserted/removed); but in my case it is not >> device insertion/removal. There is no need for a device creation when the >> DP monitor is plugged in/out(There is no device node available for me). >> Basically I want to send this removal/insertion event from my kernel >> interrupt handler to >> user space program. >> >> Regards, >> Arun C >> >> _______________________________________________ >> Kernelnewbies mailing list >> Kernelnewbies at kernelnewbies.org >> http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies >> >> > > > -- > Thanks and Regards > Pramod > > _______________________________________________ > Kernelnewbies mailing list > Kernelnewbies at kernelnewbies.org > http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies > > -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.kernelnewbies.org/pipermail/kernelnewbies/attachments/20140411/9cbaa8c5/attachment.html