LinuxQuestions.org
Welcome to the most active Linux Forum on the web.
Go Back   LinuxQuestions.org > Forums > Linux Forums > Linux - Distributions > Slackware
User Name
Password
Slackware This Forum is for the discussion of Slackware Linux.

Notices


Reply
  Search this Thread
Old 06-09-2024, 06:59 PM   #1
BuckyKatt
LQ Newbie
 
Registered: May 2024
Posts: 24

Rep: Reputation: 3
CEC support on Slackware x86_64?


I was looking into solving a problem with HDMI-CEC, and I noticed Slackware has the /usr/bin/cec-ctl present (from V4L)... but no /dev/cec devices. Any Googling I do seems to lead to Android or Linux on ARM.

Is CEC supported on x86_64? Am I overlooking an easy way to create /dev/cec?

BK
 
Old 06-09-2024, 08:16 PM   #2
BuckyKatt
LQ Newbie
 
Registered: May 2024
Posts: 24

Original Poster
Rep: Reputation: 3
I see that the cec.ko kernel module is loaded, used by i915.

Still not seeing a /dev/cec or something else that might be created by this module.

I didn't see that cec.ko was loaded at first because I was logged into the wrong system. Whoops!

BK
 
Old 06-10-2024, 02:11 AM   #3
ponce
LQ Guru
 
Registered: Aug 2004
Location: Pisa, Italy
Distribution: Slackware
Posts: 7,141

Rep: Reputation: 4208Reputation: 4208Reputation: 4208Reputation: 4208Reputation: 4208Reputation: 4208Reputation: 4208Reputation: 4208Reputation: 4208Reputation: 4208Reputation: 4208
are you sure you got CEC? because reading here most probably isn't available on your platform...
 
Old 06-10-2024, 02:27 AM   #4
BuckyKatt
LQ Newbie
 
Registered: May 2024
Posts: 24

Original Poster
Rep: Reputation: 3
Quote:
Originally Posted by ponce View Post
are you sure you got CEC? because reading here most probably isn't available on your platform...
Yeah, I have mostly read that. There is a really interesting portion where it discusses udev and systemd because a CEC configuration is necessary every time the cec device is created. Unfortunately, since I have rarely strayed from Slackware since 1996, systemd is a bit foreign to me.

I am a little puzzled as to your question of it being available on my platform. Keep in mind, I am using a 50 inch 4K Hisense TV as a monitor for several systems (and with the exception of a few quirks, I'm loving it!). In fact, my interest in HDMI-CEC is because the monitor does not handle powering on and off all that well... I'd like to see if I can make up some scripts to make it a it better... And possibly give me some software control to switch HDMI inputs... but that is REAL wishful thinking.

BK
 
Old 06-10-2024, 03:22 AM   #5
ponce
LQ Guru
 
Registered: Aug 2004
Location: Pisa, Italy
Distribution: Slackware
Posts: 7,141

Rep: Reputation: 4208Reputation: 4208Reputation: 4208Reputation: 4208Reputation: 4208Reputation: 4208Reputation: 4208Reputation: 4208Reputation: 4208Reputation: 4208Reputation: 4208
Quote:
Originally Posted by BuckyKatt View Post
I am a little puzzled as to your question of it being available on my platform. Keep in mind, I am using a 50 inch 4K Hisense TV as a monitor for several systems (and with the exception of a few quirks, I'm loving it!). In fact, my interest in HDMI-CEC is because the monitor does not handle powering on and off all that well... I'd like to see if I can make up some scripts to make it a it better... And possibly give me some software control to switch HDMI inputs... but that is REAL wishful thinking.
I was asking because the document I linked says
Quote:
Native CEC is mostly encountered in ARM devices. In x86 world the easiest option is tunneling over DisplayPort, otherwise only some Chrome OS devices and SECO UDOO single-board computers offer CEC.
the document linked there says
Quote:
4.1. Supported hardware in mainline
HDMI Transmitters:
Exynos4
Exynos5
STIH4xx HDMI CEC
V4L2 adv7511 (same HW, but a different driver from the drm adv7511)
stm32
Allwinner A10 (sun4i)
Raspberry Pi
dw-hdmi (Synopsis IP)
amlogic (meson ao-cec and ao-cec-g12a)
drm adv7511/adv7533
omap4
tegra
rk3288, rk3399
tda998x
DisplayPort CEC-Tunneling-over-AUX on i915, nouveau and amdgpu
ChromeOS EC CEC
CEC for SECO boards (UDOO x86).
Chrontel CH7322
as I understood you are asking about hdmi-CEC on x86_64 but the option listed are mostly arm-based or tunneling via display port, so...
 
1 members found this post helpful.
Old 06-10-2024, 04:05 AM   #6
ZhaoLin1457
Senior Member
 
Registered: Jan 2018
Posts: 1,071

Rep: Reputation: 1305Reputation: 1305Reputation: 1305Reputation: 1305Reputation: 1305Reputation: 1305Reputation: 1305Reputation: 1305Reputation: 1305Reputation: 1305
Quote:
Originally Posted by BuckyKatt View Post
Yeah, I have mostly read that. There is a really interesting portion where it discusses udev and systemd because a CEC configuration is necessary every time the cec device is created. Unfortunately, since I have rarely strayed from Slackware since 1996, systemd is a bit foreign to me.

I am a little puzzled as to your question of it being available on my platform. Keep in mind, I am using a 50 inch 4K Hisense TV as a monitor for several systems (and with the exception of a few quirks, I'm loving it!). In fact, my interest in HDMI-CEC is because the monitor does not handle powering on and off all that well... I'd like to see if I can make up some scripts to make it a it better... And possibly give me some software control to switch HDMI inputs... but that is REAL wishful thinking.

BK
Unfortunately, most likely your x86_64 computer has no support for HDMI CEC. Does not matter that you have a 50 inch 4K Hisense TV.

But there are USB - CEC Adapters, like the USD $43.60 one in the link below:

https://www.pulse-eight.com/p/104/usb-hdmi-cec-adapter

I recommend that, first of all, you check if your TV really supports properly HDMI CEC. You might buy the adapter and find that the TV does not support such a thing, because CEC is not mandatory.

Last edited by ZhaoLin1457; 06-10-2024 at 05:09 AM.
 
  


Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is Off
HTML code is Off



Similar Threads
Thread Thread Starter Forum Replies Last Post
CEC support for Kodi 19.5 under SW-arm 15.0 fails Johpin Slackware - ARM 6 03-29-2023 06:33 AM
[SOLVED] CEC support on RPi4 fails Johpin Slackware - ARM 8 03-22-2023 12:20 PM
LXer: HDMI CEC Fuzzing LXer Syndicated Linux News 0 08-09-2015 06:03 PM
LXer: Linux Support For HDMI CEC Still In Development LXer Syndicated Linux News 0 10-09-2012 04:10 AM
ipm timed out error on Red Hat 2.6.9-67.0.22.ELsmp #1 SMP x86_64 x86_64 x86_64 GNU/L bellnarm Linux - Newbie 0 07-07-2009 04:36 PM

LinuxQuestions.org > Forums > Linux Forums > Linux - Distributions > Slackware

All times are GMT -5. The time now is 04:40 PM.

Main Menu
Advertisement
My LQ
Write for LQ
LinuxQuestions.org is looking for people interested in writing Editorials, Articles, Reviews, and more. If you'd like to contribute content, let us know.
Main Menu
Syndicate
RSS1  Latest Threads
RSS1  LQ News
Twitter: @linuxquestions
Open Source Consulting | Domain Registration