Picture quality on laptop LCD with i915GM chipset.

Picture quality on laptop LCD with i915GM chipset.

[SD]

Dear All.

My question may look strange but I have some serious problem that prevent me of using any linuxes on kernel higher then 2.6.27.

Explanation: I have laptop i686 Celeron i915GM video. On it there is two OS - OpenSuse 11.1 (kernel 2.6.27) and now Fedora 13 (2.6.33 - 85). I have tested Fedora 12, nut upgrade it to 13.

Problem is - Picture on my laptop LCD is not suitable for eyes. I can't explain exactly why, but it looks like it is not smooth, it is rough, after some time (one hour or two) it starts to hurt eyes. Some time I think it is not stable and it is blinking. I do not use anti-aliasing, all my fonts are clear without shadows and it is very noticeable that something different, they are not look solid or stable, like it on OpenSuse 11.1. And it is not just fonts, anything on screen looks different.

Sorry I can't explain, but I can't use nor Fedora 12 nor Fedora 13.
Only OpenSuse 11.1 shows normal smooth picture.
I will definitely will check OpenSuse 11.3 when it will be ready, but I start to suspect that problem is not in distribution. Problem with something new in rendering, but it made unusable 33 kernels on my laptop (foe example). It is very frustrating. 

So, as long as I already understood that I can't use any new kernels on my current laptop, I just want to know - is there changes in picture quality on other chipsets?
I can't believe that it is only i915GM was affected, because I am really can't see Fedora 12 and 13 screen picture longer then few hours.

Thanks for comments.

Re: Picture quality on laptop LCD with i915GM chipset.

[Andrew Lutomirski]

On Fri, May 14, 2010 at 7:17 PM, SD <sd.domrep@yahoo.com> wrote:
> Dear All.
>
> My question may look strange but I have some serious problem that prevent me of using any linuxes on kernel higher then 2.6.27.
>
> Explanation: I have laptop i686 Celeron i915GM video. On it there is two OS - OpenSuse 11.1 (kernel 2.6.27) and now Fedora 13 (2.6.33 - 85). I have tested Fedora 12, nut upgrade it to 13.

Have you tried OpenSuse 11.1 with a newer kernel?

If the problem is just the fonts, you might be seeing a result of
different fonts, subpixel rendering settings, or freetype version.

If the problem is really due to the graphics driver, you should be
able to take a screenshot in one OS and look at it in the other and
see a difference.

--Andy

Re: Picture quality on laptop LCD with i915GM chipset.

[SD]

--- On Sat, 5/15/10, Andrew Lutomirski <luto@mit.edu> wrote:

> From: Andrew Lutomirski <luto@mit.edu>
> Subject: Re: [Intel-gfx] Picture quality on laptop LCD with i915GM chipset.
> To: "SD" <sd.domrep@yahoo.com>
> Cc: intel-gfx@lists.freedesktop.org
> Date: Saturday, May 15, 2010, 3:21 AM
> On Fri, May 14, 2010 at 7:17 PM, SD
> <sd.domrep@yahoo.com>
> wrote:
> > Dear All.
> >
> > My question may look strange but I have some serious
> problem that prevent me of using any linuxes on kernel
> higher then 2.6.27.
> >
> > Explanation: I have laptop i686 Celeron i915GM video.
> On it there is two OS - OpenSuse 11.1 (kernel 2.6.27) and
> now Fedora 13 (2.6.33 - 85). I have tested Fedora 12, nut
> upgrade it to 13.
> 
> Have you tried OpenSuse 11.1 with a newer kernel?
> 
> If the problem is just the fonts, you might be seeing a
> result of
> different fonts, subpixel rendering settings, or freetype
> version.
> 
> If the problem is really due to the graphics driver, you
> should be
> able to take a screenshot in one OS and look at it in the
> other and
> see a difference.
> 
> --Andy
> 

I have tried OpenSuse 11.2, which is with newer kernel and it shows the same bad like Fedora 12. So I decided to shift on fedora, but unfortunately although Fedora 13 shows screen better - it is still not usable (actually screen picture on Fedora 12 was really awful). I have tried to compare video output on OpenSuse 11.1 and Fedora 13, all of the has the same, except of "xdpyinfo": on suse it tells about 3 visuals ( number of visuals:    3), but on Fedora 13 - 32 visuals. Fedora 12 got 72.

Problems is not with fonts at all, problem with whole screen. Font, because it very contrast, is more noticeable. Also, of course I use freetype for the full hinting.
Does it happened to all intel chipset, or to only i915GM, because I of course going to change my laptop, and it looks like I am not going to by a one with intel video.

Thanks.

Re: Picture quality on laptop LCD with i915GM chipset.

[Andrew Lutomirski]

On Fri, May 14, 2010 at 8:17 PM, SD <sd.domrep@yahoo.com> wrote:
>
>
> --- On Sat, 5/15/10, Andrew Lutomirski <luto@mit.edu> wrote:
>
>> From: Andrew Lutomirski <luto@mit.edu>
>> Subject: Re: [Intel-gfx] Picture quality on laptop LCD with i915GM chipset.
>> To: "SD" <sd.domrep@yahoo.com>
>> Cc: intel-gfx@lists.freedesktop.org
>> Date: Saturday, May 15, 2010, 3:21 AM
>> On Fri, May 14, 2010 at 7:17 PM, SD
>> <sd.domrep@yahoo.com>
>> wrote:
>> > Dear All.
>> >
>> > My question may look strange but I have some serious
>> problem that prevent me of using any linuxes on kernel
>> higher then 2.6.27.
>> >
>> > Explanation: I have laptop i686 Celeron i915GM video.
>> On it there is two OS - OpenSuse 11.1 (kernel 2.6.27) and
>> now Fedora 13 (2.6.33 - 85). I have tested Fedora 12, nut
>> upgrade it to 13.
>>
>> Have you tried OpenSuse 11.1 with a newer kernel?
>>
>> If the problem is just the fonts, you might be seeing a
>> result of
>> different fonts, subpixel rendering settings, or freetype
>> version.
>>
>> If the problem is really due to the graphics driver, you
>> should be
>> able to take a screenshot in one OS and look at it in the
>> other and
>> see a difference.
>>
>> --Andy
>>
>
> I have tried OpenSuse 11.2, which is with newer kernel and it shows the same bad like Fedora 12. So I decided to shift on fedora, but unfortunately although Fedora 13 shows screen better - it is still not usable (actually screen picture on Fedora 12 was really awful). I have tried to compare video output on OpenSuse 11.1 and Fedora 13, all of the has the same, except of "xdpyinfo": on suse it tells about 3 visuals ( number of visuals:    3), but on Fedora 13 - 32 visuals. Fedora 12 got 72.
>
> Problems is not with fonts at all, problem with whole screen. Font, because it very contrast, is more noticeable. Also, of course I use freetype for the full hinting.
> Does it happened to all intel chipset, or to only i915GM, because I of course going to change my laptop, and it looks like I am not going to by a one with intel video.

In addition to changing the kernel, you've changed the entire
userspace as well.  Build your own kernel and the kernel people will
pay attention.

FWIW, my GM45 machine looks just fine on every kernel (and userspace)
I've ever tried.  (Well, the panel's a piece of crap, but that has
nothing to do with the GPU or software.)

--Andy

Re: Picture quality on laptop LCD with i915GM chipset.

[Clemens Eisserer]

Hi,

Why don't you record a video or take a screenshot to make at least
clear to us whats going on?

- Clemens

> I have tried OpenSuse 11.2, which is with newer kernel and it shows the same bad like Fedora 12. So I decided to shift on fedora, but unfortunately although Fedora 13 shows screen better - it is still not usable (actually screen picture on Fedora 12 was really awful). I have tried to compare video output on OpenSuse 11.1 and Fedora 13, all of the has the same, except of "xdpyinfo": on suse it tells about 3 visuals ( number of visuals:    3), but on Fedora 13 - 32 visuals. Fedora 12 got 72.
>
> Problems is not with fonts at all, problem with whole screen. Font, because it very contrast, is more noticeable. Also, of course I use freetype for the full hinting.
> Does it happened to all intel chipset, or to only i915GM, because I of course going to change my laptop, and it looks like I am not going to by a one with intel video.
>
> Thanks.
>
>
>
> _______________________________________________
> Intel-gfx mailing list
> Intel-gfx@lists.freedesktop.org
> http://lists.freedesktop.org/mailman/listinfo/intel-gfx
>
_______________________________________________
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
http://lists.freedesktop.org/mailman/listinfo/intel-gfx

Re: Picture quality on laptop LCD with i915GM chipset.

[SD]

--- On Sat, 5/15/10, Clemens Eisserer <linuxhippy@gmail.com> wrote:

> From: Clemens Eisserer <linuxhippy@gmail.com>
> Subject: Re: [Intel-gfx] Picture quality on laptop LCD with i915GM chipset.
> To: "intel-gfx" <intel-gfx@lists.freedesktop.org>
> Date: Saturday, May 15, 2010, 12:56 PM
> Hi,
> 
> Why don't you record a video or take a screenshot to make
> at least
> clear to us whats going on?
> 
> - Clemens

I do not blame anyone, I know you all want to help.
I tried to take a picture and take a video, but unfortunately 30 frame per second can't catch it. Everything looks nice.
I will try to explain again. In compare with kernel up to 2.6.27 (because I used Ubuntu, Mandriva), 2.6.33 looks:more brighter, may be more contrast, especially white, it is definitely more brighter although I stated xgamma 0.75. But biggest problem is that colors of the picture are not solid, stable - they are somehow blinking or flickering. Sometime I think may be back lights of LCD panel works different. And after hour or two eyes start notice it, it is looks like colors is not constant, they always changes, little bit but they are "playing".
It is very noticeable if I log into different TTY (not graphical) and just start "mc" - it present for eyes.
It is impossible to record, sorry.

Thanks for help.

> 
> > I have tried OpenSuse 11.2, which is with newer kernel
> and it shows the same bad like Fedora 12. So I decided to
> shift on fedora, but unfortunately although Fedora 13 shows
> screen better - it is still not usable (actually screen
> picture on Fedora 12 was really awful). I have tried to
> compare video output on OpenSuse 11.1 and Fedora 13, all of
> the has the same, except of "xdpyinfo": on suse it tells
> about 3 visuals ( number of visuals:    3), but on Fedora
> 13 - 32 visuals. Fedora 12 got 72.
> >
> > Problems is not with fonts at all, problem with whole
> screen. Font, because it very contrast, is more noticeable.
> Also, of course I use freetype for the full hinting.
> > Does it happened to all intel chipset, or to only
> i915GM, because I of course going to change my laptop, and
> it looks like I am not going to by a one with intel video.
> >
> > Thanks.
> >
> >
> >
> > _______________________________________________
> > Intel-gfx mailing list
> > Intel-gfx@lists.freedesktop.org
> > http://lists.freedesktop.org/mailman/listinfo/intel-gfx
> >
> _______________________________________________
> Intel-gfx mailing list
> Intel-gfx@lists.freedesktop.org
> http://lists.freedesktop.org/mailman/listinfo/intel-gfx
> 


      

Re: Picture quality on laptop LCD with i915GM chipset.

[Florian Mickler]

On Fri, 14 May 2010 16:17:56 -0700 (PDT)
SD <sd.domrep@yahoo.com> wrote:

> Dear All.

> Problem is - Picture on my laptop LCD is not suitable for eyes. I can't explain exactly why, but it looks like it is not smooth, it is rough, after some time (one hour or two) it starts to hurt eyes. Some time I think it is not stable and it is blinking. I do not use anti-aliasing, all my fonts are clear without shadows and it is very noticeable that something different, they are not look solid or stable, like it on OpenSuse 11.1. And it is not just fonts, anything on screen looks different.
>
> Thanks for comments.
> 

Hi!

I'm sorry if this is maybe too basic. But are you aware of screen
resolutions and the fact, that if the graphics-card drives your
lcd-screen at a different-then-optimal resolution some monitors do
interpolation of pixels to ''multiplex'' them to the monitor-resolution.

This can be easily detected by looking at the /var/log/Xorg.0.log in
both the good and the bad case. (or by looking at the output of
'xrandr').

Cheers,
Flo

Re: Picture quality on laptop LCD with i915GM chipset.

[Pedro Ribeiro]

On 15 May 2010 16:42, SD <sd.domrep@yahoo.com> wrote:
>
>
> --- On Sat, 5/15/10, Clemens Eisserer <linuxhippy@gmail.com> wrote:
>
>> From: Clemens Eisserer <linuxhippy@gmail.com>
>> Subject: Re: [Intel-gfx] Picture quality on laptop LCD with i915GM chipset.
>> To: "intel-gfx" <intel-gfx@lists.freedesktop.org>
>> Date: Saturday, May 15, 2010, 12:56 PM
>> Hi,
>>
>> Why don't you record a video or take a screenshot to make
>> at least
>> clear to us whats going on?
>>
>> - Clemens
>
> I do not blame anyone, I know you all want to help.
> I tried to take a picture and take a video, but unfortunately 30 frame per second can't catch it. Everything looks nice.
> I will try to explain again. In compare with kernel up to 2.6.27 (because I used Ubuntu, Mandriva), 2.6.33 looks:more brighter, may be more contrast, especially white, it is definitely more brighter although I stated xgamma 0.75. But biggest problem is that colors of the picture are not solid, stable - they are somehow blinking or flickering. Sometime I think may be back lights of LCD panel works different. And after hour or two eyes start notice it, it is looks like colors is not constant, they always changes, little bit but they are "playing".
> It is very noticeable if I log into different TTY (not graphical) and just start "mc" - it present for eyes.
> It is impossible to record, sorry.
>
> Thanks for help.
>
>>
>> > I have tried OpenSuse 11.2, which is with newer kernel
>> and it shows the same bad like Fedora 12. So I decided to
>> shift on fedora, but unfortunately although Fedora 13 shows
>> screen better - it is still not usable (actually screen
>> picture on Fedora 12 was really awful). I have tried to
>> compare video output on OpenSuse 11.1 and Fedora 13, all of
>> the has the same, except of "xdpyinfo": on suse it tells
>> about 3 visuals ( number of visuals:    3), but on Fedora
>> 13 - 32 visuals. Fedora 12 got 72.
>> >
>> > Problems is not with fonts at all, problem with whole
>> screen. Font, because it very contrast, is more noticeable.
>> Also, of course I use freetype for the full hinting.
>> > Does it happened to all intel chipset, or to only
>> i915GM, because I of course going to change my laptop, and
>> it looks like I am not going to by a one with intel video.
>> >
>> > Thanks.
>> >
>> >
>> >
>> > _______________________________________________
>> > Intel-gfx mailing list
>> > Intel-gfx@lists.freedesktop.org
>> > http://lists.freedesktop.org/mailman/listinfo/intel-gfx
>> >
>> _______________________________________________
>> Intel-gfx mailing list
>> Intel-gfx@lists.freedesktop.org
>> http://lists.freedesktop.org/mailman/listinfo/intel-gfx
>>
>
>
>
> _______________________________________________
> Intel-gfx mailing list
> Intel-gfx@lists.freedesktop.org
> http://lists.freedesktop.org/mailman/listinfo/intel-gfx
>

Hi,

you can take a screenshot with gnome-screenshot. Just install the
program and run it from the command line (or you if have gnome, press
the PrtScr key).

Regards,
Pedro

Re: Picture quality on laptop LCD with i915GM chipset

[SD]

> From: Jin, Gordon <gordon.jin at intel.com>
> Subject: RE: [Intel-gfx] Picture quality on laptop LCD with i915GM chipset
> To: "SD" <sd.domrep at yahoo.com>, "intel-gfx at lists.freedesktop.org" <intel-gfx at lists.freedesktop.org>
> Date: Wednesday, May 19, 2010, 6:03 AM
> SD wrote on Wednesday, May 19, 2010
> 8:32 AM:
> >>> From: Clemens Eisserer <linuxhippy at
> gmail.com>
> >>> Subject: Re: [Intel-gfx] Picture quality on
> laptop LCD with i915GM
> >>> chipset. To: "intel-gfx" <intel-gfx at
> lists.freedesktop.org>
> >>> Date: Saturday, May 15, 2010, 12:56 PM
> >>> Hi,
> >>> 
> >>> Why don't you record a video or take a
> screenshot to make
> >>> at least
> >>> clear to us whats going on?
> >>> 
> >>> - Clemens
> >> 
> >> I do not blame anyone, I know you all want to
> help.
> >> I tried to take a picture and take a video, but
> unfortunately 30
> >> frame per second can't catch it. Everything looks
> nice. 
> >> I will try to explain again. In compare with
> kernel up to 2.6.27
> >> (because I used Ubuntu, Mandriva), 2.6.33
> looks:more brighter, may
> >> be more contrast, especially white, it is
> definitely more brighter
> >> although I stated xgamma 0.75. But biggest problem
> is that colors of
> >> the picture are not solid, stable - they are
> somehow blinking or
> >> flickering. Sometime I think may be back lights of
> LCD panel works
> >> different. And after hour or two eyes start notice
> it, it is looks
> >> like colors is not constant, they always changes,
> little bit but
> >> they are "playing". It is very noticeable if I log
> into different
> >> TTY (not graphical) and just start "mc" - it
> present for eyes.      
> >> It is impossible to record, sorry.
> >> 
> >> Thanks for help.
> >> 
> >>> 
> >>>> I have tried OpenSuse 11.2, which is with
> newer kernel
> >>> and it shows the same bad like Fedora 12. So I
> decided to
> >>> shift on fedora, but unfortunately although
> Fedora 13 shows
> >>> screen better - it is still not usable
> (actually screen
> >>> picture on Fedora 12 was really awful). I have
> tried to
> >>> compare video output on OpenSuse 11.1 and
> Fedora 13, all of
> >>> the has the same, except of "xdpyinfo": on
> suse it tells
> >>> about 3 visuals ( number of visuals: 
>   3), but on Fedora
> >>> 13 - 32 visuals. Fedora 12 got 72.
> >>>> 
> >>>> Problems is not with fonts at all, problem
> with whole
> >>> screen. Font, because it very contrast, is
> more noticeable.
> >>> Also, of course I use freetype for the full
> hinting.
> >>>> Does it happened to all intel chipset, or
> to only
> >>> i915GM, because I of course going to change my
> laptop, and
> >>> it looks like I am not going to by a one with
> intel video.
> >>>> 
> >>>> Thanks.
> > 
> > 
> > 
> > Dear All.
> > 
> > At last, I found the problem - it is new kernel 33 and
> 34, I took
> > them from Fedora. 
> > I put them to my OpenSuse 11.1 (27 kernel) and boot it
> up.
> > Picture of the screen became unusable. And it is not
> Xorg with its
> > drivers, because except of the kernel everything from
> OpenSuse 11.1 -
> > it is kernel.  
> > I do not know how it works with other GPU (intel or
> nvidia), but mine
> > i915GM shows awful screen. 
> > I know what is wrong with picture - colors of the
> pixels. They are
> > not static, they change. Little bit, but change. It
> became more
> > noticeable when I just reboot. For example white - it
> is white, but
> > it changes around white, and as color is brighter it
> is more
> > annoying. 
> 
> Flickering? Does booting kernel with i915.powersave=0
> work?
> 
> > May be I am wrong about all of it, I for sure - I am
> not
> > going to use 33 and 34 kernel with i915GM. 
>   
> 


> Just checked on Fedora Rawhide 34 kernel. Booted with i915.powersave=0 -
> there is no difference.
> I would say that pixel changes brightness. For example, I found a 1 pixel line on
> fxce panel - white line surrounding by gray aria. And it is possible to notice that
> pixels on gray line next to white is not constantly gray, they are flickering or
> changing brightness.


I am happy to say that I found source of my problems.
DRI2 module.

As long as I start Xorg with "Disable DRI2" in module section I have normal picture and I have normal smooth rotatin of the gears in "glxgears" test.
Output of the "glxgears" without dri2 module:
565 frames in 5.0 seconds = 112.932 FPS
559 frames in 5.0 seconds = 111.726 FPS
558 frames in 5.0 seconds = 111.590 FPS
554 frames in 5.0 seconds = 110.797 FPS
569 frames in 5.0 seconds = 113.742 FPS
XIO:  fatal IO error 11 (Resource temporarily unavailable) on X server ":0.0"
      after 6301 requests (36 known processed) with 0 events remaining.

Output of TOP:
1676 vas       20   0 15784 4868 1760 R 52.6  0.3   0:03.75 glxgears
1032 root      20   0 53664  12m 7124 S 39.9  0.8   0:50.63 X

Of course there is no H/W acceleration, but no more eyes problems also.

I am happy, I can use fedora.

Re: Picture quality on laptop LCD with i915GM chipset

[SD]

--- On Wed, 5/19/10, Jin, Gordon <gordon.jin@intel.com> wrote:

> From: Jin, Gordon <gordon.jin@intel.com>
> Subject: RE: [Intel-gfx] Picture quality on laptop LCD with i915GM chipset
> To: "SD" <sd.domrep@yahoo.com>, "intel-gfx@lists.freedesktop.org" <intel-gfx@lists.freedesktop.org>
> Date: Wednesday, May 19, 2010, 6:03 AM
> SD wrote on Wednesday, May 19, 2010
> 8:32 AM:
> >>> From: Clemens Eisserer <linuxhippy at
> gmail.com>
> >>> Subject: Re: [Intel-gfx] Picture quality on
> laptop LCD with i915GM
> >>> chipset. To: "intel-gfx" <intel-gfx at
> lists.freedesktop.org>
> >>> Date: Saturday, May 15, 2010, 12:56 PM
> >>> Hi,
> >>> 
> >>> Why don't you record a video or take a
> screenshot to make
> >>> at least
> >>> clear to us whats going on?
> >>> 
> >>> - Clemens
> >> 
> >> I do not blame anyone, I know you all want to
> help.
> >> I tried to take a picture and take a video, but
> unfortunately 30
> >> frame per second can't catch it. Everything looks
> nice. 
> >> I will try to explain again. In compare with
> kernel up to 2.6.27
> >> (because I used Ubuntu, Mandriva), 2.6.33
> looks:more brighter, may
> >> be more contrast, especially white, it is
> definitely more brighter
> >> although I stated xgamma 0.75. But biggest problem
> is that colors of
> >> the picture are not solid, stable - they are
> somehow blinking or
> >> flickering. Sometime I think may be back lights of
> LCD panel works
> >> different. And after hour or two eyes start notice
> it, it is looks
> >> like colors is not constant, they always changes,
> little bit but
> >> they are "playing". It is very noticeable if I log
> into different
> >> TTY (not graphical) and just start "mc" - it
> present for eyes.      
> >> It is impossible to record, sorry.
> >> 
> >> Thanks for help.
> >> 
> >>> 
> >>>> I have tried OpenSuse 11.2, which is with
> newer kernel
> >>> and it shows the same bad like Fedora 12. So I
> decided to
> >>> shift on fedora, but unfortunately although
> Fedora 13 shows
> >>> screen better - it is still not usable
> (actually screen
> >>> picture on Fedora 12 was really awful). I have
> tried to
> >>> compare video output on OpenSuse 11.1 and
> Fedora 13, all of
> >>> the has the same, except of "xdpyinfo": on
> suse it tells
> >>> about 3 visuals ( number of visuals: 
>   3), but on Fedora
> >>> 13 - 32 visuals. Fedora 12 got 72.
> >>>> 
> >>>> Problems is not with fonts at all, problem
> with whole
> >>> screen. Font, because it very contrast, is
> more noticeable.
> >>> Also, of course I use freetype for the full
> hinting.
> >>>> Does it happened to all intel chipset, or
> to only
> >>> i915GM, because I of course going to change my
> laptop, and
> >>> it looks like I am not going to by a one with
> intel video.
> >>>> 
> >>>> Thanks.
> > 
> > 
> > 
> > Dear All.
> > 
> > At last, I found the problem - it is new kernel 33 and
> 34, I took
> > them from Fedora. 
> > I put them to my OpenSuse 11.1 (27 kernel) and boot it
> up.
> > Picture of the screen became unusable. And it is not
> Xorg with its
> > drivers, because except of the kernel everything from
> OpenSuse 11.1 -
> > it is kernel.  
> > I do not know how it works with other GPU (intel or
> nvidia), but mine
> > i915GM shows awful screen. 
> > I know what is wrong with picture - colors of the
> pixels. They are
> > not static, they change. Little bit, but change. It
> became more
> > noticeable when I just reboot. For example white - it
> is white, but
> > it changes around white, and as color is brighter it
> is more
> > annoying. 
> 
> Flickering? Does booting kernel with i915.powersave=0
> work?
> 
> > May be I am wrong about all of it, I for sure - I am
> not
> > going to use 33 and 34 kernel with i915GM. 
>   
> 


Just checked on Fedora Rawhide 34 kernel. Booted with i915.powersave=0 - there is no difference.
I would say that pixel changes brightness. For example, I found a 1 pixel line on fxce panel - white line surrounding by gray aria. And it is possible to notice that pixels on gray line next to white is not constantly gray, they are flickering or changing brightness.




      

Re: Picture quality on laptop LCD with i915GM chipset

[Jin, Gordon]

SD wrote on Wednesday, May 19, 2010 8:32 AM:
>>> From: Clemens Eisserer <linuxhippy at gmail.com>
>>> Subject: Re: [Intel-gfx] Picture quality on laptop LCD with i915GM
>>> chipset. To: "intel-gfx" <intel-gfx at lists.freedesktop.org>
>>> Date: Saturday, May 15, 2010, 12:56 PM
>>> Hi,
>>> 
>>> Why don't you record a video or take a screenshot to make
>>> at least
>>> clear to us whats going on?
>>> 
>>> - Clemens
>> 
>> I do not blame anyone, I know you all want to help.
>> I tried to take a picture and take a video, but unfortunately 30
>> frame per second can't catch it. Everything looks nice. 
>> I will try to explain again. In compare with kernel up to 2.6.27
>> (because I used Ubuntu, Mandriva), 2.6.33 looks:more brighter, may
>> be more contrast, especially white, it is definitely more brighter
>> although I stated xgamma 0.75. But biggest problem is that colors of
>> the picture are not solid, stable - they are somehow blinking or
>> flickering. Sometime I think may be back lights of LCD panel works
>> different. And after hour or two eyes start notice it, it is looks
>> like colors is not constant, they always changes, little bit but
>> they are "playing". It is very noticeable if I log into different
>> TTY (not graphical) and just start "mc" - it present for eyes.      
>> It is impossible to record, sorry.
>> 
>> Thanks for help.
>> 
>>> 
>>>> I have tried OpenSuse 11.2, which is with newer kernel
>>> and it shows the same bad like Fedora 12. So I decided to
>>> shift on fedora, but unfortunately although Fedora 13 shows
>>> screen better - it is still not usable (actually screen
>>> picture on Fedora 12 was really awful). I have tried to
>>> compare video output on OpenSuse 11.1 and Fedora 13, all of
>>> the has the same, except of "xdpyinfo": on suse it tells
>>> about 3 visuals ( number of visuals:    3), but on Fedora
>>> 13 - 32 visuals. Fedora 12 got 72.
>>>> 
>>>> Problems is not with fonts at all, problem with whole
>>> screen. Font, because it very contrast, is more noticeable.
>>> Also, of course I use freetype for the full hinting.
>>>> Does it happened to all intel chipset, or to only
>>> i915GM, because I of course going to change my laptop, and
>>> it looks like I am not going to by a one with intel video.
>>>> 
>>>> Thanks.
> 
> 
> 
> Dear All.
> 
> At last, I found the problem - it is new kernel 33 and 34, I took
> them from Fedora. 
> I put them to my OpenSuse 11.1 (27 kernel) and boot it up.
> Picture of the screen became unusable. And it is not Xorg with its
> drivers, because except of the kernel everything from OpenSuse 11.1 -
> it is kernel.  
> I do not know how it works with other GPU (intel or nvidia), but mine
> i915GM shows awful screen. 
> I know what is wrong with picture - colors of the pixels. They are
> not static, they change. Little bit, but change. It became more
> noticeable when I just reboot. For example white - it is white, but
> it changes around white, and as color is brighter it is more
> annoying. 

Flickering? Does booting kernel with i915.powersave=0 work?

> May be I am wrong about all of it, I for sure - I am not
> going to use 33 and 34 kernel with i915GM.    

Re: Picture quality on laptop LCD with i915GM chipset

[SD]

>> From: Clemens Eisserer <linuxhippy at gmail.com>
>> Subject: Re: [Intel-gfx] Picture quality on laptop LCD with i915GM chipset.
>> To: "intel-gfx" <intel-gfx at lists.freedesktop.org>
>> Date: Saturday, May 15, 2010, 12:56 PM
>> Hi,
>>
>> Why don't you record a video or take a screenshot to make
>> at least
>> clear to us whats going on?
>>
>> - Clemens
>
> I do not blame anyone, I know you all want to help.
> I tried to take a picture and take a video, but unfortunately 30 frame per second can't catch it. Everything looks nice.
> I will try to explain again. In compare with kernel up to 2.6.27 (because I used Ubuntu, Mandriva), 2.6.33 looks:more brighter, may be more contrast, especially white, it is definitely more brighter although I stated xgamma 0.75. But biggest problem is that colors of the picture are not solid, stable - they are somehow blinking or flickering. Sometime I think may be back lights of LCD panel works different. And after hour or two eyes start notice it, it is looks like colors is not constant, they always changes, little bit but they are "playing".
> It is very noticeable if I log into different TTY (not graphical) and just start "mc" - it present for eyes.
> It is impossible to record, sorry.
>
> Thanks for help.
>
>>
>> > I have tried OpenSuse 11.2, which is with newer kernel
>> and it shows the same bad like Fedora 12. So I decided to
>> shift on fedora, but unfortunately although Fedora 13 shows
>> screen better - it is still not usable (actually screen
>> picture on Fedora 12 was really awful). I have tried to
>> compare video output on OpenSuse 11.1 and Fedora 13, all of
>> the has the same, except of "xdpyinfo": on suse it tells
>> about 3 visuals ( number of visuals:    3), but on Fedora
>> 13 - 32 visuals. Fedora 12 got 72.
>> >
>> > Problems is not with fonts at all, problem with whole
>> screen. Font, because it very contrast, is more noticeable.
>> Also, of course I use freetype for the full hinting.
>> > Does it happened to all intel chipset, or to only
>> i915GM, because I of course going to change my laptop, and
>> it looks like I am not going to by a one with intel video.
>> >
>> > Thanks.



Dear All.

At last, I found the problem - it is new kernel 33 and 34, I took them from Fedora.
I put them to my OpenSuse 11.1 (27 kernel) and boot it up.
Picture of the screen became unusable. And it is not Xorg with its drivers, because except of the kernel everything from OpenSuse 11.1 - it is kernel.
I do not know how it works with other GPU (intel or nvidia), but mine i915GM shows awful screen.
I know what is wrong with picture - colors of the pixels. They are not static, they change. Little bit, but change. It became more noticeable when I just reboot. For example white - it is white, but it changes around white, and as color is brighter it is more annoying.
May be I am wrong about all of it, I for sure - I am not going to use 33 and 34 kernel with i915GM.

Thanks everyone.

Re: Picture quality on laptop LCD with i915GM chipset.

[Pedro Ribeiro]

On 16 May 2010 21:06, Pedro Ribeiro <pedrib@gmail.com> wrote:
> On 16 May 2010 20:57, SD <sd.domrep@yahoo.com> wrote:
>> --- On Sun, 5/16/10, Florian Mickler <florian@mickler.org> wrote:
>>
>>> From: Florian Mickler <florian@mickler.org>
>>> Subject: Re: [Intel-gfx] Picture quality on laptop LCD with i915GM chipset.
>>> To: "SD" <sd.domrep@yahoo.com>
>>> Cc: intel-gfx@lists.freedesktop.org
>>> Date: Sunday, May 16, 2010, 8:22 PM
>>> On Fri, 14 May 2010 16:17:56 -0700
>>> (PDT)
>>> SD <sd.domrep@yahoo.com>
>>> wrote:
>>>
>>> > Dear All.
>>>
>>> > Problem is - Picture on my laptop LCD is not suitable
>>> for eyes. I can't explain exactly why, but it looks like it
>>> is not smooth, it is rough, after some time (one hour or
>>> two) it starts to hurt eyes. Some time I think it is not
>>> stable and it is blinking. I do not use anti-aliasing, all
>>> my fonts are clear without shadows and it is very noticeable
>>> that something different, they are not look solid or stable,
>>> like it on OpenSuse 11.1. And it is not just fonts, anything
>>> on screen looks different.
>>> >
>>> > Thanks for comments.
>>> >
>>>
>>> Hi!
>>>
>>> I'm sorry if this is maybe too basic. But are you aware of
>>> screen
>>> resolutions and the fact, that if the graphics-card drives
>>> your
>>> lcd-screen at a different-then-optimal resolution some
>>> monitors do
>>> interpolation of pixels to ''multiplex'' them to the
>>> monitor-resolution.
>>>
>>> This can be easily detected by looking at the
>>> /var/log/Xorg.0.log in
>>> both the good and the bad case. (or by looking at the
>>> output of
>>> 'xrandr').
>>>
>>> Cheers,
>>> Flo
>>>
>>
>> I took digital pictures of my screen. So left side is Fedora 13, right - OpenSuse11.1
>> Xrandr gives me the same output, except for something which is different of xrandr version.
>>
>> So please take a look at the pictures of my screen (part of it).
>> It is clearly - something is different, but:
>> "Subpixel:   horizontal rgb"  -  in both OS.
>>
>> Thanks.
>>
>>
>>
>> _______________________________________________
>> Intel-gfx mailing list
>> Intel-gfx@lists.freedesktop.org
>> http://lists.freedesktop.org/mailman/listinfo/intel-gfx
>>
>>
>
> I can clearly see a difference, but I seriously doubt the fault lies
> on the intel driver. Can you try compiling a .33 kernel on Opensuse
> and see if you have the same problem?
>
> Regards,
> Pedro
>

Actually you don't even need to do that, you can install packages with
2.6.34-rc7 from here:

http://download.opensuse.org/repositories/Kernel:/HEAD/openSUSE_Factory/i586/
or
http://download.opensuse.org/repositories/Kernel:/HEAD/openSUSE_Factory/x86_64/
(if you have 64 bit)

I believe the package you want is
kernel-desktop-2.6.34-rc7.31.1... etc

Disclaimer: I do not have opensuse so I'm just guessing

Re: Picture quality on laptop LCD with i915GM chipset.

[SD]

[-- Attachment #1: Type: text/plain, Size: 1781 bytes --]

--- On Sun, 5/16/10, Florian Mickler <florian@mickler.org> wrote:

> From: Florian Mickler <florian@mickler.org>
> Subject: Re: [Intel-gfx] Picture quality on laptop LCD with i915GM chipset.
> To: "SD" <sd.domrep@yahoo.com>
> Cc: intel-gfx@lists.freedesktop.org
> Date: Sunday, May 16, 2010, 8:22 PM
> On Fri, 14 May 2010 16:17:56 -0700
> (PDT)
> SD <sd.domrep@yahoo.com>
> wrote:
> 
> > Dear All.
> 
> > Problem is - Picture on my laptop LCD is not suitable
> for eyes. I can't explain exactly why, but it looks like it
> is not smooth, it is rough, after some time (one hour or
> two) it starts to hurt eyes. Some time I think it is not
> stable and it is blinking. I do not use anti-aliasing, all
> my fonts are clear without shadows and it is very noticeable
> that something different, they are not look solid or stable,
> like it on OpenSuse 11.1. And it is not just fonts, anything
> on screen looks different.
> >
> > Thanks for comments.
> > 
> 
> Hi!
> 
> I'm sorry if this is maybe too basic. But are you aware of
> screen
> resolutions and the fact, that if the graphics-card drives
> your
> lcd-screen at a different-then-optimal resolution some
> monitors do
> interpolation of pixels to ''multiplex'' them to the
> monitor-resolution.
> 
> This can be easily detected by looking at the
> /var/log/Xorg.0.log in
> both the good and the bad case. (or by looking at the
> output of
> 'xrandr').
> 
> Cheers,
> Flo
> 

I took digital pictures of my screen. So left side is Fedora 13, right - OpenSuse11.1
Xrandr gives me the same output, except for something which is different of xrandr version.

So please take a look at the pictures of my screen (part of it).
It is clearly - something is different, but:
"Subpixel:   horizontal rgb"  -  in both OS.

Thanks.


      

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