Tested Bionic daily 20180321 in a live session, still happens.
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https://bugs.launchpad.net/bugs/1752844
Title:
Graphical artifacts with antialiased lines in OpenGL
To manage
Public bug reported:
After an indeterminate amount of time, the refresh rate drops to about
15 fps until reboot.
The problem appeared with 17.2.x. It also happens with 17.3.3.
Initially reported with ubuntu-bug:
https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1752830. Decided to
report
** Description changed:
On Ubuntu 16.04.3, as from the update fixing
- https://bugs.launchpad.net/ubuntu/+source/mesa/+bug/1735594, the line
- rendering in applications using Opengl 1 is incorrect.
+ https://bugs.launchpad.net/ubuntu/+source/mesa/+bug/1735594, antialiased
+ line rendering in
Tested 17.3.3, no success.
The artifacts appeared after the #1735594 fix, so they may be specific
to i965. My computer graphics indicate "Mobile Intel® GM45 Express
Chipset".
I found that the game titanion looks as expected when the window is
resized to 960x720 or greater. Inspecting the source
Public bug reported:
On Ubuntu 16.04.3, as from the update fixing
https://bugs.launchpad.net/ubuntu/+source/mesa/+bug/1735594, the line
rendering in applications using Opengl 1 is incorrect.
Blender and various games by Kenta Cho (tumiki-figthers, torus-trooper,
parsec47, titanion) are affected.
Public bug reported:
After some time of use, the desktop framerate drops to about 15 fps permanently,
requiring a system restart to get back to normal.
The top command does not indicate any increase in cpu or memory use.
ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: xorg 1:7.7+13ubuntu3
Proposed fixed the crash in compiz and blender, but introduces graphical
glitches (at least) in blender 2.79 (from the official website), and in the
packages
tumiki-fighters and torus-trooper.
It looks like a wireframe being drawn on top of some elements on the
screen.
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This issue seems to affect Blender.
Blender fails to start, with the crash log being the following:
# backtrace
blender(BLI_system_backtrace+0x20) [0x1a6c8e0]
blender() [0x107a525]
/lib/x86_64-linux-gnu/libc.so.6(+0x354b0) [0x7f47797c04b0]
/usr/lib/x86_64-linux-gnu/dri/i965_dri.so(+0x5ddc16)
I got this bug too. MyPaint doesn't render the brush cursor and throws
an error again when is selected a brush with a default cursor size
different from the current (i.e from pencil to eraser). As the people
above, it's only occurs when Mir is enabled.
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I don't think the kernel is related, because I tested with kernel
3.5(it worked well with Ubuntu 12.10, with acpi_backlight=vendor) and
had the same problem. I'm using 13.04 and Acer Aspire 4332. If I do
sudo su and echo (brightness value)
/sys/class/backlight/intel_backlight/brightness in the
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