[Intel-gfx] [BUG] Cursor code broken

[Daniel Vetter]

On Wed, Apr 09, 2014 at 08:16:30AM +0200, Knut Petersen wrote:
> Hi Chris!
> 
> The intel xorg driver cursor code is broken, at least on my system.
> The last good commit is 3810cff42bca1badc5844002694a6f582c0f423.

Hm, you mean

commit 25ca8f136cef9e1bdf06967bf8e78c87b54ffce2
Author: Chris Wilson <chris at chris-wilson.co.uk>
Date:   Thu Mar 27 14:15:30 2014 +0000

    sna: Support variable sized cursors

Iirc Chris already fixed this in latest git.
-Daniel

> 
> Hardware: AOpen i915GMm-hfs with Pentium-M Dothan cpu
> Software: openSuSE 13.1, kernel 3.14, xorg git master,  kde
> 
> Expected behavior:
> ===============
> 
>  If the mouse cursor hits a window border, it changes it appearance and stays at the same location. If the left mouse button
> is depressed the window might be resized.
> 
> Current behavior:
> =============
> 
> The mouse cursor hits a window border, it does not change its appearance and is relocated a few pixels instead. If the mouse
> cursor is moved a bit further there is a second unexpected relocation to the opposite direction. This new behavior of the mouse cursor has been
> implemented for both axes. Resizing is impossible as the mouse cursor cannot be put exactly on the window border.
> 
> After I realized that the intel driver is the cause of the problem,
> I bisected. During bisecting I realized that there are two cursor
> problems after 3810cff42, the one described above that is still
> present in current git HEAD and a problem with a totally distorted
> cursor image that already has been solved. In the bisect log below
> "good" means "cursor handling completely ok", "bad" means "one or
> both of the cursor problems present".
> 
> git bisect start
> # good: [220accd828c5a0054ae9e3b491a434f7a6c750e0] sna: Only enable cursor support if the hw cursor is supported
> git bisect good 220accd828c5a0054ae9e3b491a434f7a6c750e0
> # bad: [3310ee89c1f1a663de5f5b12b8125809a213996f] sna: Avoid discarding damage when applying WHOLE hint to pixmap migration
> git bisect bad 3310ee89c1f1a663de5f5b12b8125809a213996f
> # bad: [80792a3f490578735065d9f67ca6ebac00b5bb75] sna: Our cursors are always square.
> git bisect bad 80792a3f490578735065d9f67ca6ebac00b5bb75
> # good: [e3810cff42bca1badc5844002694a6f582c0f423] sna: Move cursor reload into crtc notify
> git bisect good e3810cff42bca1badc5844002694a6f582c0f423
> # bad: [e07f8e2e625fb34f9ad795ca8fffc9a9e88e25b2] sna: Fix 2-color to ARGB cursor conversion
> git bisect bad e07f8e2e625fb34f9ad795ca8fffc9a9e88e25b2
> # bad: [e8be2a438d7a413ba6c64005971ce814b0076fc7] sna: Clear the surrounding areas of small cursors
> git bisect bad e8be2a438d7a413ba6c64005971ce814b0076fc7
> # bad: [25ca8f136cef9e1bdf06967bf8e78c87b54ffce2] sna: Support variable sized cursors
> git bisect bad 25ca8f136cef9e1bdf06967bf8e78c87b54ffce2
> # first bad commit: [25ca8f136cef9e1bdf06967bf8e78c87b54ffce2] sna: Support variable sized cursors
> # bad: [25ca8f136cef9e1bdf06967bf8e78c87b54ffce2] sna: Support variable sized cursors
> git bisect bad 25ca8f136cef9e1bdf06967bf8e78c87b54ffce2
> # first bad commit: [25ca8f136cef9e1bdf06967bf8e78c87b54ffce2] sna: Support variable sized cursors
> # bad: [25ca8f136cef9e1bdf06967bf8e78c87b54ffce2] sna: Support variable sized cursors
> git bisect bad 25ca8f136cef9e1bdf06967bf8e78c87b54ffce2
> # first bad commit: [25ca8f136cef9e1bdf06967bf8e78c87b54ffce2] sna: Support variable sized cursors
> 
> cu,
>  Knut
> 
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-- 
Daniel Vetter
Software Engineer, Intel Corporation
+41 (0) 79 365 57 48 - http://blog.ffwll.ch