[mythtv-users] Amdgpu disable power management?

[Hika van den Hoven]

Hoi Daniel,

Friday, August 25, 2017, 4:42:53 PM, you wrote:




> On Thu, Aug 24, 2017 at 7:15 PM Hika van den Hoven <hikavdh at gmail.com> wrote:

> Hoi Daniel,
>  
>  Friday, August 25, 2017, 12:57:13 AM, you wrote:
>  
 >> Anyone know how to disable power management on the amdgpu driver?
 >> Whenever I turn off the TV it disconnects and I'm left with a black
 >> screen when I try to turn it back on. Sometimes I have to unplug the
 >> HDMI cable before restarting lighten.
 >> This is on xubuntu 16.04.
 >> I tried putting a minimal xorg config to disable hot plugging, but it had no effect.
>  
>  I don't think it's a powermanagement thing, but a HDMI thing. There
>  have been maybe a year ago several threads about this.
>  I use in my boot manager:
>  
>  modeset=1 video=DVI-I-1:e
>  
>  to force the hdmi port to be enabled, independent of any connected
>  monitor. Which one will be your hdmi is dependent on your card.
>  
>  Tot mails,
>    Hika                            mailto:hikavdh at gmail.com
>  


> Thanks Hika,


> Can you give a little more info on how to best detect these items? 
> Also, Can I just add this to /etc/default/grub?  Or do I need to edit it on boot?


> Thanks,
> Dan 

I don't work with grub, but with lilo. These are boot parameters you
apend to your kernel. modeset=1 enables the kernel managing the
console videomodes. The second part enables that port (d disables it).
You can also set te console resolution (for instance:
"video=DVI-I-1:1024x768-32 at 60"), but that does not seem to work with
the plug-in nvidia module.

So you have to check grub documentation where to add boot parameters.
The port names you can find in your bootlog or dmesg.


Tot mails,
  Hika                            mailto:hikavdh at gmail.com

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