video module limited after suspend

video module limited after suspend

[Jan Rychter]

Hi,

I have ACPI compiled into the kernel and various subsystems as
modules. The 'video' module seems to have a problem, though -- it works
great on first boot, but doesn't work correctly after a suspend/resume
(I'm using suspend2, unloading and reloading the video module after
resuming).

The symptoms are that all subdirectories of /proc/acpi/video/VGA/
disappear -- which means I can no longer set the LCD brighness. All I
have is this:

total 0
-r--r--r--  1 root root 0 Jun 17 18:25 DOS
-r--r--r--  1 root root 0 Jun 17 18:25 POST
-r--r--r--  1 root root 0 Jun 17 18:25 POST_info
-r--r--r--  1 root root 0 Jun 17 18:25 ROM
-r--r--r--  1 root root 0 Jun 17 18:25 info

Any hints?

--J.



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Re: video module limited after suspend

[Jan Rychter]

> Hi,
> I have ACPI compiled into the kernel and various subsystems as
> modules. The 'video' module seems to have a problem, though -- it works
> great on first boot, but doesn't work correctly after a suspend/resume
> (I'm using suspend2, unloading and reloading the video module after
> resuming).
> 
> The symptoms are that all subdirectories of /proc/acpi/video/VGA/
> disappear -- which means I can no longer set the LCD brighness. All I
> have is this:
> 
> total 0
> -r--r--r--  1 root root 0 Jun 17 18:25 DOS
> -r--r--r--  1 root root 0 Jun 17 18:25 POST
> -r--r--r--  1 root root 0 Jun 17 18:25 POST_info
> -r--r--r--  1 root root 0 Jun 17 18:25 ROM
> -r--r--r--  1 root root 0 Jun 17 18:25 info
> 
> Any hints?

To narrow things down a bit: I've found out that it isn't really
suspending that matters -- just doing 

modprobe video; rmmod video; modprobe video

gets me a system without the CRT, LCD, DVI and TV directories.

As a workaround, I've just compiled video into the kernel (e.g. not
modularized) and I'm fine.

Is anyone actually interested in those bug reports? Should I bother?

--J.



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Re: Re: video module limited after suspend

[Bruno Ducrot]

On Wed, Jun 22, 2005 at 11:17:09AM +0200, Jan Rychter wrote:
> > Hi,
> > I have ACPI compiled into the kernel and various subsystems as
> > modules. The 'video' module seems to have a problem, though -- it works
> > great on first boot, but doesn't work correctly after a suspend/resume
> > (I'm using suspend2, unloading and reloading the video module after
> > resuming).
> > 
> > The symptoms are that all subdirectories of /proc/acpi/video/VGA/
> > disappear -- which means I can no longer set the LCD brighness. All I
> > have is this:
> > 
> > total 0
> > -r--r--r--  1 root root 0 Jun 17 18:25 DOS
> > -r--r--r--  1 root root 0 Jun 17 18:25 POST
> > -r--r--r--  1 root root 0 Jun 17 18:25 POST_info
> > -r--r--r--  1 root root 0 Jun 17 18:25 ROM
> > -r--r--r--  1 root root 0 Jun 17 18:25 info
> > 
> > Any hints?
> 
> To narrow things down a bit: I've found out that it isn't really
> suspending that matters -- just doing 
> 
> modprobe video; rmmod video; modprobe video
> 
> gets me a system without the CRT, LCD, DVI and TV directories.
> 
> As a workaround, I've just compiled video into the kernel (e.g. not
> modularized) and I'm fine.
> 
> Is anyone actually interested in those bug reports? Should I bother?
> 

Me, but don't have time for linux kernel devel ATM

-- 
Bruno Ducrot

--  Which is worse:  ignorance or apathy?
--  Don't know.  Don't care.


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