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Re: Display issues (Was: Next GNUstep release)


From: Sergii Stoian
Subject: Re: Display issues (Was: Next GNUstep release)
Date: Sat, 29 Feb 2020 03:33:47 +0200

Hi,

> On Feb 28, 2020, at 12:37, Riccardo Mottola <address@hidden> wrote:
> 
> Hi,
> 
> Sergii Stoian wrote:
>> Hi,
>> 
>>> On Feb 27, 2020, at 23:09, Riccardo Mottola <address@hidden> wrote:
>>> 
>>> Hi,
>>> 
>>> before a release, I would like these issues to find a solution.
>>> 
>>> - understand why we don't work properly on my ThinkPad T23 neither with the 
>>> Cairo nor with the xlib backend with similar issues
>> Could you please be more specific and describe these issues?
> 
> I have an issue I am working on with Fred, I can forward you some mail 
> because they contain screenshot and I did not spam the mailing list.
> 
> Essentially I discovered that many windows contain "garbage" and what we 
> discovered so far
> - certain windows width cause garbage do be displayed, resizing the window 
> may cause it do display correctly
> - this garbage is compatible with an wrong offset increasing for each row 
> (you see diagonal lines if  you have a white window with a border)
> - the issue happens both with cairo and xlib (recent discovery of two days 
> ago, before we were concentrating on a cairo issue)
> 
> it looks like an issue that somwehre a padding/alignment is lost: e.g. 
> width*bytesPerPixel != bytesPerRow, but where?
> 
> I have not seen this issue elsewhere. The T23 is itself a pretty standard 
> setup: Devuan ascii, GCC runtime, i386. Only the videocard is a little bit 
> vintage/odd (S3) but it works with any other program except GNUstep :-P
> 
> 
> Riccardo

Could you test it with “vesa” video driver to be sure it’s not a driver problem?


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