[Bug 652863] Re: plasma-panel and window-decorations not transparent

[Åke Svedin]

Same here. Never ran lucid. But I did not experience this bug the first
boot directly after a clean install from the Maverick Kubuntu DVD. I
have a laptop with switchable graphics (Intel + ATI), but I quickly
disabled the discrete card and blacklisted the driver. I also upgraded
to KDE 4.5.4 from kubuntu-ppa. The next boot, I had this bug! Hmm.. I
also added an option "acpi_osi=Linux" to grub, but that was later,
should be unrelated.

I've tried the following (in this order):
1) Delete ~/.kde directory and log in again.
2) Downgrading to non-ppa KDE.
3) Trying out Gnome which did not show any sort of rendering bugs.
4) Upgrading intel driver (ppa:ubuntu-x-swat/x-updates and ppa:xorg-edgers/ppa)
5) Upgrading to KDE 4.6 Beta 2 via kubuntu beta ppa.

I did not try to enabled the discrete adapter.

Kwin settings:
OpenGL (and all defaults) = This bug
OpenGL w/o blur effect = The kickoff menu, notifications and bar are transparent! but way too transparent. Text in notifications become very hard to read.
The setting "Transparency" does only affect window transparency, which works fine anyway.
XRender = Seems to work fine.
glxinfo:
...
OpenGL vendor string: Tungsten Graphics, Inc
OpenGL renderer string: Mesa DRI Intel(R) Ironlake Mobile GEM 20100330 DEVELOPMENT 
OpenGL version string: 2.1 Mesa 7.10-devel
...

lsmod | grep video
uvcvideo               62379  0 
videodev               49359  1 uvcvideo
v4l1_compat            15519  2 uvcvideo,videodev
v4l2_compat_ioctl32    12486  1 videodev
video                  22176  1 i915
output                  2527  1 video

lspci | grep VGA
00:02.0 VGA compatible controller: Intel Corporation Core Processor Integrated Graphics Controller (rev 18)
02:00.0 VGA compatible controller: ATI Technologies Inc Redwood [Radeon HD 5600 Series] (rev ff)

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https://bugs.launchpad.net/bugs/652863

Title:
  plasma-panel and window-decorations not transparent