×
UNIX.COM Login
Username:
Password:  
Show Password






👤


Hardware

Device drivers, hardware compatibility issues, motherboards, disk drives, graphics cards and other hardware related topics.

VGA distributor hardware detection

detection, hardware, monitor, vga

👤 Login to reply
 
Thread Tools Search this Thread Display Modes
    #1  
Old 02-07-2018
diehard diehard is offline
Registered User
 
Join Date: Jan 2011
Last Activity: 7 February 2018, 1:23 PM EST
Posts: 54
Thanks: 21
Thanked 1 Time in 1 Post
VGA distributor hardware detection

Hi,

I am trying to find the monitor information attach to my system. To get the detail I have decoded the information available in edid file using edid-decode utility.

The file is available at /sys/devices/pci0000:00/0000:00:01.0/drm/card0/card0-VGA-1/edid

After decoding edid file I get the attached monitor details. Now I have situation where I am using VGA distributor which split the signal and I can connect multiple monitor through it.After doing this I am still getting the same monitor information in my edid file.Second monitor detail is missing from it. I try to restart the system and found that file empty edid file is generated if two monitor is connected.

I have concluded that after starting the system some utility is actually creating the edid file but I am not sure which one is doing this.

Can anyone let me know how to detect if multiple monitor is connected to my system through VGA distributor ? I am using Ubuntu 14.04 on HP machine.

Any help or suggestion is highly appreciated.



Thanks
Sponsored Links
    #2  
Old 02-07-2018
Corona688 Corona688 is offline Forum Staff  
Mead Rotor
 
Join Date: Aug 2005
Last Activity: 16 July 2018, 3:49 PM EDT
Location: Saskatchewan
Posts: 22,724
Thanks: 1,192
Thanked 4,349 Times in 4,005 Posts
I am fairly certain what you want isn't possible with a VGA distributor. You'd need separate video cards to get different EDID data through each.
The Following User Says Thank You to Corona688 For This Useful Post:
diehard (02-07-2018)
Sponsored Links
    #3  
Old 02-07-2018
diehard diehard is offline
Registered User
 
Join Date: Jan 2011
Last Activity: 7 February 2018, 1:23 PM EST
Posts: 54
Thanks: 21
Thanked 1 Time in 1 Post
Thanks.

Is there any other method to identified if VGA distributor is connected to my system Or Any method to forcefully generate edid file.
    #4  
Old 02-07-2018
RudiC RudiC is offline Forum Staff  
Moderator
 
Join Date: Jul 2012
Last Activity: 17 July 2018, 6:59 AM EDT
Location: Aachen, Germany
Posts: 13,065
Thanks: 448
Thanked 4,013 Times in 3,690 Posts
Attach only one monitor at a time, have the edid file created at startup, and save it with a meaningful name.
I'd guess that with multiple monitors attached via a distributor the info (if any!) flowing back to the host will be promiscuous and ambiguous due to collisions.
Sponsored Links
    #5  
Old 02-07-2018
Corona688 Corona688 is offline Forum Staff  
Mead Rotor
 
Join Date: Aug 2005
Last Activity: 16 July 2018, 3:49 PM EDT
Location: Saskatchewan
Posts: 22,724
Thanks: 1,192
Thanked 4,349 Times in 4,005 Posts
Quote:
Originally Posted by diehard View Post
Is there any other method to identified if VGA distributor is connected to my system
No.
Quote:
Or Any method to forcefully generate edid file.
Pretty much "do it yourself".

Perhaps you could disable detection and use a profile you know works for all monitors.
Sponsored Links
👤 Login to reply

« Previous Thread | Next Thread »
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

More UNIX and Linux Forum Topics You Might Find Helpful
Thread Thread Starter Forum Replies Last Post
Vga passtrough with only one monitor,is possible? Linusolaradm1 Linux 0 11-21-2016 03:07 PM
Parallel Processing Detection and Program Return Value Detection azar.zorn Programming 4 07-01-2011 06:13 PM
need help changing the vga mode neur0n UNIX for Dummies Questions & Answers 5 02-04-2011 03:52 PM
Vga Installation Linus Aloo UNIX Desktop Questions & Answers 2 06-26-2007 08:34 AM



All times are GMT -4. The time now is 09:45 AM.

Unix & Linux Forums Content Copyrightę1993-2018. All Rights Reserved.