distorted text

distorted text

[Simon Vincent]

Hi,

I have previously been using Linux 3.16 with a OLED 128x32 display setup 
as a fbconsole. This was working well until I upgraded to linux 4.0. Now 
the console text is displayed on the OLED but the text is no longer 
clear, it looks distorted.
I have uploaded a photo of the problem here. 
http://s3.postimg.org/66a7lrp2b/IMG_20150520_114135_2.jpg

Is this a known bug?

Simon

Re: distorted text

[Simon Vincent]

Sorry slightly incorrect I upgraded to linux v4.1-rc4.

I have done some testing and the display works correctly with clear text 
on Linux v4.0 but is distorted/corrupted on v4.1-rc1. (These are tagged 
releases from https://github.com/torvalds/linux).

I have had a look at the changes but I can't find anything that might 
cause the problem although I don't know much about this part of Linux.
Any ideas?

Simon

On 20/05/15 11:46, Simon Vincent wrote:
> Hi,
>
> I have previously been using Linux 3.16 with a OLED 128x32 display 
> setup as a fbconsole. This was working well until I upgraded to linux 
> 4.0. Now the console text is displayed on the OLED but the text is no 
> longer clear, it looks distorted.
> I have uploaded a photo of the problem here. 
> http://s3.postimg.org/66a7lrp2b/IMG_20150520_114135_2.jpg
>
> Is this a known bug?
>
> Simon
> -- 
> To unsubscribe from this list: send the line "unsubscribe linux-fbdev" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html

Re: distorted text

[Simon Vincent]

Has anyone else seen this problem?

Regards

Simon

On 20/05/15 17:03, Simon Vincent wrote:
> Sorry slightly incorrect I upgraded to linux v4.1-rc4.
>
> I have done some testing and the display works correctly with clear 
> text on Linux v4.0 but is distorted/corrupted on v4.1-rc1. (These are 
> tagged releases from https://github.com/torvalds/linux).
>
> I have had a look at the changes but I can't find anything that might 
> cause the problem although I don't know much about this part of Linux.
> Any ideas?
>
> Simon
>
> On 20/05/15 11:46, Simon Vincent wrote:
>> Hi,
>>
>> I have previously been using Linux 3.16 with a OLED 128x32 display 
>> setup as a fbconsole. This was working well until I upgraded to linux 
>> 4.0. Now the console text is displayed on the OLED but the text is no 
>> longer clear, it looks distorted.
>> I have uploaded a photo of the problem here. 
>> http://s3.postimg.org/66a7lrp2b/IMG_20150520_114135_2.jpg
>>
>> Is this a known bug?
>>
>> Simon
>> -- 
>> To unsubscribe from this list: send the line "unsubscribe 
>> linux-fbdev" in
>> the body of a message to majordomo@vger.kernel.org
>> More majordomo info at http://vger.kernel.org/majordomo-info.html
>
> -- 
> To unsubscribe from this list: send the line "unsubscribe linux-fbdev" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html

Re: distorted text

[Geert Uytterhoeven]

On Wed, May 20, 2015 at 6:03 PM, Simon Vincent <simon.vincent@xsilon.com> wrote:
> I have done some testing and the display works correctly with clear text on
> Linux v4.0 but is distorted/corrupted on v4.1-rc1. (These are tagged
> releases from https://github.com/torvalds/linux).
>
> I have had a look at the changes but I can't find anything that might cause
> the problem although I don't know much about this part of Linux.
> Any ideas?

Can you please try to bisect the problem?

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds