630620 - [Linux][layers-accel] Autoscroll overlay icon is broken, with layers acceleration enabled

Status: RESOLVED DUPLICATE of bug 630346

(Core :: Graphics, defect)

Description

[Daniel Holbert [:dholbert]]

STEPS TO REPRODUCE:
On a Linux laptop that has a trackpad (unsure if this affects desktop/mice):
 1. Toggle these prefs:
          layers.acceleration.force-enabled = true
          general.autoScroll                = true
    and restart Firefox so those take effect.

 2. Visit a long page like http://planet.mozilla.org

 3. Click both trackpad buttons simultaneously to invoke autoscroll

ACTUAL RESULTS: The autoscroll overlay paints as a busted rect, generally displaying munged content from under/nearby it instead of the "compass" icon that it's supposed to show.

Mozilla/5.0 (X11; Linux x86_64; rv:2.0b11pre) Gecko/20110201 Firefox/4.0b11pre
OS: Ubuntu 10.10 x86_64 (w/ compiz enabled, as it is by default)
Graphics card: NVIDIA NVS 3100M (using proprietary nvidia driver from Ubuntu)

Comment 1

[Daniel Holbert [:dholbert]]

Attachment: normal autoscroll overlay (what it's supposed to look like)

Comment 2

[Daniel Holbert [:dholbert]]

Attachment: BROKEN autoscroll overlay (w/ layers accel enabled)

Comment 3

[Timothy Nikkel (:tnikkel)]

I guess this has never worked correctly? ie not a regression? Maybe we don't support transparent windows on accelerated linux or something.

Comment 4

[Daniel Holbert [:dholbert]]

(In reply to comment #3)
> I guess this has never worked correctly? ie not a regression?

I don't know, but I'd bet that you're right.

(I don't normally use autoscroll - I just accidentally stumbled across this bug today on a machine that happened to have it enabled.)

Comment 5

[Constantine]

I think it is transparency issue because some popups (for example question to allow installing addons) looks like autoscroll. And I can't remember the time when it wasn't. Also with NVidia proprietary driver.

Comment 6

[:aceman]

I can still see this on Firefox 10, Radeon HD 4350, Mesa 7.11.
The scroll icon does not have the effect as in the screenshot, but it's shadow is not transparent, it is plain black.

Comment 7

[drago01]

Attachment: Corrupted autoscroll icon

The icon is corrupted for me too, see attachment.

glxinfo:
------------
OpenGL vendor string: NVIDIA Corporation
OpenGL renderer string: GeForce GTX 285/PCI/SSE2
OpenGL version string: 3.3.0 NVIDIA 285.05.09
OpenGL shading language version string: 3.30 NVIDIA via Cg compiler
-----------

Comment 9

[:aceman]

That is almost the same what I see, just without the gray round "halo" around the icon. But I do not have that even without accelerated layers forced.

Comment 10

[Karl Tomlinson (:karlt)]

I bet this is the same issue as bug 630346.