Bug reports on the psb-gfx driver

[Kristoffer Eriksson]

Alan Cox skrev 2012-04-18 23:21:
>> That frequency seems about the same as the one I'm experiences. All though
>> some times it's more often, but I can't say I've done anything special at
>> the same time.
>>
>> 3.3.2-1-ARCH
>> Intel(R) Atom(TM) CPU Z520 @ 1.33GHz
>>
>> Attachment: dmesg ouput
>>
> What X display server are you using (fbdev or other ?). Also I see a few
> writes to the brightness in the log - did you fiddle with the brightness
> by hand at all ?
Alan,

Without looking at the code I can say that those brightness commands are 
not related to this
issue since Ive been having them since the first working kernel version.
Havent had time to look at the code but Ive understod them to happen 
simply when you
press a key to return from backlight suspend. Something like the default 
brightness setting that gets invoked
after return from suspend.

H?var see
[ 7659.177126] gma500 :00:02.0: Backlight lvds set brightness 186a186a

while I see
[] gma500 :00:02.0: Backlight lvds set brightness 7a127a12



>
> Either way I suspect the only way to find this is to verify a
> configuration it occurs on, go back a kernel, verify it doesn't happen
> there and then build a kernel to the point in the git tree before the
> gma500 patches were changed (to check its not caused by something else
> such as an ACPI change), then try and find which one caused it.
Will do further fresh builds to see if I can reproduce the blanking 
issue and also
test out the patch.


> That will be tedious but unfortunately I've got no documentation or other
> good ways to chase this down.
>
> Alan
>

Re: Bug reports on the psb-gfx driver

[Kristoffer Eriksson]

Alan Cox skrev 2012-04-18 23:21:

That frequency seems about the same as the one I'm experiences. All though
some times it's more often, but I can't say I've done anything special at
the same time.

3.3.2-1-ARCH
Intel(R) Atom(TM) CPU Z520 @ 1.33GHz

Attachment: dmesg ouput


What X display server are you using (fbdev or other ?). Also I see a few
writes to the brightness in the log - did you fiddle with the brightness
by hand at all ?

Alan,

Without looking at the code I can say that those brightness commands are 
not related to this

issue since Ive been having them since the first working kernel version.
Havent had time to look at the code but Ive understod them to happen 
simply when you
press a key to return from backlight suspend. Something like the default 
brightness setting that gets invoked

after return from suspend.

Håvar see
[ 7659.177126] gma500 :00:02.0: Backlight lvds set brightness 186a186a

while I see
[] gma500 :00:02.0: Backlight lvds set brightness 7a127a12





Either way I suspect the only way to find this is to verify a
configuration it occurs on, go back a kernel, verify it doesn't happen
there and then build a kernel to the point in the git tree before the
gma500 patches were changed (to check its not caused by something else
such as an ACPI change), then try and find which one caused it.
Will do further fresh builds to see if I can reproduce the blanking 
issue and also

test out the patch.



That will be tedious but unfortunately I've got no documentation or other
good ways to chase this down.

Alan



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Bug reports on the psb-gfx driver

[Alan Cox]

> That frequency seems about the same as the one I'm experiences. All though
> some times it's more often, but I can't say I've done anything special at
> the same time.
> 
> 3.3.2-1-ARCH
> Intel(R) Atom(TM) CPU Z520 @ 1.33GHz
> 
> Attachment: dmesg ouput
> 

What X display server are you using (fbdev or other ?). Also I see a few
writes to the brightness in the log - did you fiddle with the brightness
by hand at all ?


Either way I suspect the only way to find this is to verify a
configuration it occurs on, go back a kernel, verify it doesn't happen
there and then build a kernel to the point in the git tree before the
gma500 patches were changed (to check its not caused by something else
such as an ACPI change), then try and find which one caused it.

That will be tedious but unfortunately I've got no documentation or other
good ways to chase this down.

Alan

Re: Bug reports on the psb-gfx driver

[Alan Cox]

 That frequency seems about the same as the one I'm experiences. All though
 some times it's more often, but I can't say I've done anything special at
 the same time.
 
 3.3.2-1-ARCH
 Intel(R) Atom(TM) CPU Z520 @ 1.33GHz
 
 Attachment: dmesg ouput
 

What X display server are you using (fbdev or other ?). Also I see a few
writes to the brightness in the log - did you fiddle with the brightness
by hand at all ?


Either way I suspect the only way to find this is to verify a
configuration it occurs on, go back a kernel, verify it doesn't happen
there and then build a kernel to the point in the git tree before the
gma500 patches were changed (to check its not caused by something else
such as an ACPI change), then try and find which one caused it.

That will be tedious but unfortunately I've got no documentation or other
good ways to chase this down.

Alan
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Bug reports on the psb-gfx driver

[Håvar Nøvik]

>
> H?var N?vik skrev 2012-04-17 12:53:
>
>> Hi,
>>
>>  Greetings,


>  I'm experiencing a bug with the driver after a kernel upgrade (3.2 ->
>> 3.3). Every once in a while the screen is blacking out for a second or two.
>>
>> Anyways, I was wondering where I could look at bug reports or report a
>> new one if I can't find a similar?
>>
>>  Ive done a fresh build and Im seeing that same issue that you are
> describing. In a frequency of about 5-15mins it blackens and then returns
> within 1-2 seconds. Could you give us a dmesg output? I will do some
> bugtracking once I get back to my laptop.
> Alan, any thoughts?


That frequency seems about the same as the one I'm experiences. All though
some times it's more often, but I can't say I've done anything special at
the same time.

3.3.2-1-ARCH
Intel(R) Atom(TM) CPU Z520 @ 1.33GHz

Attachment: dmesg ouput


>
> PS: Thanks for the great work on a GMA 500 driver!
>
>>
>>  Alan is the one to thank. :)
>

Thanks to Alan, then :D


>  
>> Regards H?var N?vik
>>
>
>
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Bug reports on the psb-gfx driver

[Kristoffer Eriksson]

H?var N?vik skrev 2012-04-17 12:53:
> Hi,
>
Greetings,
> I'm experiencing a bug with the driver after a kernel upgrade (3.2 -> 
> 3.3). Every once in a while the screen is blacking out for a second or 
> two.
>
> Anyways, I was wondering where I could look at bug reports or report a 
> new one if I can't find a similar?
>
Ive done a fresh build and Im seeing that same issue that you are 
describing. In a frequency of about 5-15mins it blackens and then returns
within 1-2 seconds. Could you give us a dmesg output? I will do some 
bugtracking once I get back to my laptop.
Alan, any thoughts?

PS: Thanks for the great work on a GMA 500 driver!
>
Alan is the one to thank. :)
> 
> Regards H?var N?vik

Re: Bug reports on the psb-gfx driver

[Kristoffer Eriksson]

Håvar Nøvik skrev 2012-04-17 12:53:

Hi,


Greetings,
I'm experiencing a bug with the driver after a kernel upgrade (3.2 - 
3.3). Every once in a while the screen is blacking out for a second or 
two.


Anyways, I was wondering where I could look at bug reports or report a 
new one if I can't find a similar?


Ive done a fresh build and Im seeing that same issue that you are 
describing. In a frequency of about 5-15mins it blackens and then returns
within 1-2 seconds. Could you give us a dmesg output? I will do some 
bugtracking once I get back to my laptop.

Alan, any thoughts?

PS: Thanks for the great work on a GMA 500 driver!



Alan is the one to thank. :)


Regards Håvar Nøvik


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