[gentoo-user] DPMS not working with fbdev driver on Xorg

[Sebastián Pedersen]

Hi guys,

Sorry to bother because I'm actually using Arch, but since in the past
this list has given to me outstandings solutions, I git a try here.

I'm having a problem: in Xorg, with the vesa driver the DPMS works just
fine, but with the fbdev driver (framebuffer) the screen goes blank but
the monitor never enters in powersave mode.
And the only configuration that I modify is the video driver in use.

My main problem is that the vesa driver doens't work very well with my
video card, so that's why I use the fbdev driver.

Any ideas why this happend?

Many thanks in advance.

Cheers,
Sebas

[Dale]

Since this is video related, are you in the video group? Several other
video issues have popped up recently that seem to require users in the
video group. It's easy enough to check. This should work.

cat /etc/group | grep video

If that doesn't help, I'm sure someone will come along with other ideas.

Dale

:-) :-)

[Sebastián Pedersen]

Thanks. I'm in the video group.

Yeah, hope someone can help.
I would like it to work because comsuption of electricity is a variable
to control for me right now.

Thanks any way.

Sebas

[Mick]

On Sunday 17 Apr 2016 13:23:35 Sebastián Pedersen wrote:
> On 17-04-2016 12:43 PM, Dale wrote:
> > Sebastián Pedersen wrote:
> >> Hi guys,
> >>
> >> Sorry to bother because I'm actually using Arch, but since in the past
> >> this list has given to me outstandings solutions, I git a try here.
> >>
> >> I'm having a problem: in Xorg, with the vesa driver the DPMS works
> >> just fine, but with the fbdev driver (framebuffer) the screen goes
> >> blank but the monitor never enters in powersave mode.
> >> And the only configuration that I modify is the video driver in use.

Modern kernels do not need vesa, other than a fallback if the main drivers for
the card fail.

> >> My main problem is that the vesa driver doens't work very well with my
> >> video card, so that's why I use the fbdev driver.

You should instead be using the appropriate driver for your card, along with
the correct firmware, so that it can load the framebuffer sub-module as it
needs to.

> >> Any ideas why this happend?
> >>
> >> Many thanks in advance.
> >>
> >> Cheers,
> >> Sebas
> >
> > Since this is video related, are you in the video group? Several other
> > video issues have popped up recently that seem to require users in the
> > video group. It's easy enough to check. This should work.
> >
> > cat /etc/group | grep video
> >
> > If that doesn't help, I'm sure someone will come along with other
> > ideas.
> >
> > Dale
> >
> > :-) :-)
>
> Thanks. I'm in the video group.
>
> Yeah, hope someone can help.
> I would like it to work because comsuption of electricity is a variable
> to control for me right now.
>
> Thanks any way.
>
> Sebas

Have you have a look in your dmesg and your Xorg.0.log to see what they
report? Is the firmware for the card specified correctly and does it load?

--
Regards,
Mick

[Sebastián Pedersen]

> Have you have a look in your dmesg and your Xorg.0.log to see what they
> report? Is the firmware for the card specified correctly and does it
> load?

I think that's the problem, I have a sis 771/671 video integrated card:

[sebas@parabolaSebas64 ~]$ lspci | grep -i vga
01:00.0 VGA compatible controller: Silicon Integrated Systems [SiS]
771/671 PCIE VGA Display Adapter (rev 10)

and none of the video drivers seems to work, except vesa and fbdev
(althought I'm still intrigated why DPMS works with vesa driver and not
with fbdev driver)

Thanks.
Sebas

[Daniel Frey]

Have you tried the xorg SIS driver? It lists the 671 as a supported
model @ http://www.x.org/archive/X11R7.5/doc/man/man4/sis.4.html

This is not a kernel driver, it's an xorg driver.

Have you tried the steps here: https://wiki.archlinux.org/index.php/SiS ?

Those SIS cards are not exactly fast but using the proper Xorg driver
with the proper parameters as per the Arch wiki may help it work.

Dan

[Sebastián Pedersen]

On 17-04-2016 05:28 PM, Daniel Frey wrote:
> On 04/17/2016 12:44 PM, Sebastián Pedersen wrote:
>>> Have you have a look in your dmesg and your Xorg.0.log to see what
>>> they
>>> report? Is the firmware for the card specified correctly and does it
>>> load?
>>
>> I think that's the problem, I have a sis 771/671 video integrated
>> card:
>>
>> [sebas@parabolaSebas64 ~]$ lspci | grep -i vga
>> 01:00.0 VGA compatible controller: Silicon Integrated Systems [SiS]
>> 771/671 PCIE VGA Display Adapter (rev 10)
>>
>> and none of the video drivers seems to work, except vesa and fbdev
>> (althought I'm still intrigated why DPMS works with vesa driver and
>> not
>> with fbdev driver)
>>
>> Thanks.
>> Sebas
>>
>
> Have you tried the xorg SIS driver? It lists the 671 as a supported
> model @ http://www.x.org/archive/X11R7.5/doc/man/man4/sis.4.html

The sis 771/671 it's not listed

>
> This is not a kernel driver, it's an xorg driver.
>
> Have you tried the steps here: https://wiki.archlinux.org/index.php/SiS
> ?

Yes I did and with no luck.

>
> Those SIS cards are not exactly fast but using the proper Xorg driver
> with the proper parameters as per the Arch wiki may help it work.
>
> Dan

Anyway thanks Dan.

The original question (why DPMS is not working with the fbdev driver)
still remains open thou.

Sebas

[Daniel Frey]

On 04/17/2016 01:46 PM, Sebastián Pedersen wrote:
> Anyway thanks Dan.
>
> The original question (why DPMS is not working with the fbdev driver)
> still remains open thou.
>
> Sebas

Yes, I misread that, sorry.

Regarding your original question, I have had DPMS not work on some
onboard video laptops until acpid was installed. This is a real shot in
the dark, though.

Dan

[Sebastián Pedersen]

No worries.

ok, thanks, I'll give it a try on acpid. No harm on that.

Sebas