Graphical errors on charts in resources tab (faded bands)

[Ben Mellor]

On my system, the charts on the system monitor resources tab are displayed with some graphical errors.

The most obvious manifestation seems to be faded bands along the charted lines, though there is also extra white around the chart area (rather than the grey of the window background). The chart labels also end up quite blurry and hard to read. Sometimes the pink line for memory usage seems to hover horizontally right in one of the faded areas, and becomes nearly invisible.

Bizarrely, the problem is sometimes only present on one of my monitors. The screenshot I have attached was taken straddling the two monitors; the zone on the left appears normal, while the zone on the right is noticeably affected. Dragging the system monitor between the two monitors causes the issue to appear and disappear. However, other times there is no difference and the system monitor is affected equally no matter which monitor it is on.

Ubuntu release: Oneiric 11.10, x86_64
gnome-system-monitor: 3.2.0-0ubuntu1

[Paul Natsuo Kishimoto (khaeru)]

Similar issue, even worse appearance with gnome-system-monitor 3.2.1-0ubuntu1.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Riku Eskelinen (kingi89)]

I am also affected by this bug, using gnome-system-monitor 3.2.1-0ubuntu1, with ATi Radeon HD 3450, fglrx and my CRT monitor connected via DVI-VGA adapter to DVI output.

I don't know if gnome-system-monitor is the one to blame (could this be due to some kind of color profile or subpixel hinting feature?), but someone with more knowledge about this should really look into this.

[Robert Roth (evfool)]

I have tested this on four different systems:
* Two with ATI video cards using fglrx, both of them had this issue, comment 4 also mentioned fglrx
* One with ATI video card using the opensource Xorg driver, it's not affected
* One with Intel video card using the opensource driver, and it's not affected.
I haven't had the chance to test this on NVidia cards, but it seems to me that this can only be experienced when using fglrx (the binary ATI video card driver). If anyone can reproduce this on non-fglrx, please comment here, to know that it's not an fglrx-only problem.

[Yaroslav (grigfather)]

I think this is compiz bug -- just try "metacity --replace"

[jagarsoft (jagarsoft)]

Hi
I don't know if it's related.

Lines of scale are not shown (see attachment)

I've just upgrade to Precise from Lucid.

$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 12.04 LTS
Release: 12.04
Codename: precise
$ uname -a
Linux neurope 3.2.0-27-generic #43-Ubuntu SMP Fri Jul 6 14:46:35 UTC 2012 i686 i686 i386 GNU/Linux

PS: metacity --replace didn't work :-(

[Robert Roth (evfool)]

@jagarsoft: I think the issue you are seeing is bug #989581, check if the workaround at [1] helps.
[1] https://bugs.launchpad.net/ubuntu/+source/shimmer-themes/+bug/989581/comments/3

[jagarsoft (jagarsoft)]

Thanks Robert Roth (evfool)
I set up to Radiance theme (Ambiance (default) didn't look be working) and I haven't got greybird theme.
Solved!!

[Robert Roth (evfool)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. This particular bug has already been reported and is a duplicate of bug #1019245, so it is being marked as such. Please look at the other bug report to see if there is any missing information that you can provide, or to see if there is a workaround for the bug. Additionally, any further discussion regarding the bug should occur in the other report. Feel free to continue to report any other bugs you may find.

I am marking this as a duplicate of a more recent bug, as the other has already been reported upstream.