[ANNOUNCE] xf86-video-intel 2.99.905

[Chris Clayton]

Hi again.

On 10/30/13 17:12, Chris Clayton wrote:
> Hi Chris,
> 
> I've been trying out this driver and have been getting some text rendering problems on my KDE-3.5.10 desktop. I've also
> grabbed the tar ball of the latest git version of the driver (ed282456240cc0a7ae9a235ea8aea14a8b8a54ef) and get the same
> problem. I do not see the problem with 2.99.904.
> 
> The problem is that if I open a new konqueror window, place the mouse cursor in it and then scroll the window contents
> with the mouse wheel, I get text in the window decorations at the bottom of the window. I've attached a snapshot of an
> affected konqueror window (hope it gets through your and X.org's mail filters). Sometimes the text also spills out on to
> the desktop itself and remains there until that part of the screen is refreshed for some reason - e.g. drag a window
> onto and then off the area. I have a snapshot of that too and can send it if it would help, although I guess that's
> unlikely.
> 
>  Do you have any immediate ides which change might be the "culprit" and I could try reverting? If not, I can clone the
> git tree and do a bisect.
> 

I've done a bisect and I ended up with:

ec0866e86d365ae3fd9790b1b263d49fc4981220 is the first bad commit
commit ec0866e86d365ae3fd9790b1b263d49fc4981220
Author: Chris Wilson <chris at chris-wilson.co.uk>
Date:   Wed Oct 16 22:39:54 2013 +0100

    sna/glyphs: Fix computation of extents for long strings

    And make sure we consider such overflowing strings for correct clipping
    against Windows.

    To offset the cost of doing a full extents check (~10% on aa10text), we
    introduce an approximate extents query (~1% on aa10text). The disparity
    should be rare, and should be an overestimate to force redundant
    clipping.

    Reported-by: Clemens Eisserer <linuxhippy at gmail.com>
    Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=70541
    Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>

:040000 040000 9f18aa33be6c0af2cd6e527943efa8dfe401c7cb 65a7be4deacaacc9c6f90a911317f40b37299bf4 M      src

Unfortunately, the commit doesn't revert cleanly and looks a bit too complex for me to start hacking out. However, I
have confirmed that a driver built from a tarball up to and including the preceding  does not have the problem, whereas
one built from the tarball that includes up to and including this commit does.

Let me know if I can test a patch, but please cc me as I'm not subscribed to the list.

Chris

> Thanks
> 
> Chris Clayton
>