[Intel-gfx] Picture quality on laptop LCD with i915GM chipset.

[Andrew Lutomirski]

On Fri, May 14, 2010 at 8:17 PM, SD <sd.domrep at yahoo.com> wrote:
>
>
> --- On Sat, 5/15/10, Andrew Lutomirski <luto at mit.edu> wrote:
>
>> From: Andrew Lutomirski <luto at mit.edu>
>> Subject: Re: [Intel-gfx] Picture quality on laptop LCD with i915GM chipset.
>> To: "SD" <sd.domrep at yahoo.com>
>> Cc: intel-gfx at lists.freedesktop.org
>> Date: Saturday, May 15, 2010, 3:21 AM
>> On Fri, May 14, 2010 at 7:17 PM, SD
>> <sd.domrep at 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