virt-manager: Light grey menu items on light grey background are barely readable

Setting to Medium. I think only virt-manager is affected.

GTK2 combos in other apps are correctly showing as dark grey menus with light text. And GTK3 combos in other apps are correctly showing as light grey menus with dark text.

This problem seems to be confined to virt-manager so far.

I (for virt-manager) are not GTKxperienced enough to even know what to try :-/
If I understand you correctly it is picking up the change to the font color but not the background color - is that right?

virt-manager mostly uses gir from "Source: gtk+3.0" for display.
But that should be working.

If there are experienced desktop tips what should be tried please let me know.

At least I can confirm the issue with a KVM install of http://cdimage.ubuntu.com/daily-live/current/bionic-desktop-amd64.iso

Tried virt-manager in there, and see the reported readbility issue.

But I installed gnome-tweaks and ALL themes except ambience work juts fine.
So the default of Adwaita, good, any as I said all else good.

For I'd much more consider it an issue in the latest "Ambience" Theme than virt-manager.
It might use a more uncommon thing, but since all others work it should be the theme right?

Setting virt-manager low, until we have a reason to assume that a fix it would be better than a fix in the Theme (that would also fix anything else that is affected).

This is too deep in /usr/share/themes/Ambiance for me to spot all the right and wrong entries.

And sorry, the theme I meant obviously is Ambiance (with an a).

Since this is part of ubuntu-themes and a task already is filed against that we can wait for the Desktop/Theme folks to comment.

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

This bug was fixed in the package ubuntu-themes - 16.10+18.10.20181005-0ubuntu1

---------------
ubuntu-themes (16.10+18.10.20181005-0ubuntu1) cosmic; urgency=medium

  [ Khurshid Alam ]
  * Remove nonexistent gnome-builder.css (LP: #1773045)

  [ Marco Trevisan (Treviño) ]
  * Radiance: fix typo in assets link for focused buttons (LP: #1781736)
  * Radiance: Use scaled image for buttons border (LP: #1781736)
  * Ambiance, Radiance: don't use padding on window buttons for chromium
    (LP: #1782038)
  * Ambiance: use default foreground color for toolbar menus (LP:
    #1758841)
  * Ambiance, Radiance: show proper arrow in combobox (LP: #1743373)
  * Ambiance, Radiance: use default disabled color for actions headerbar
    buttons (LP: #1785699)
  * Ambiace, Radiance: use headerbar destructive-action definition for
    buttons
  * Ambiance, Radiance: fix list selected color for gnome-boxes (LP:
    #1761684)
  * Ambiance, Radiance: properly theme disabled and hovered accelerators
    (LP: #1795895)

 -- Marco Trevisan (Treviño) <mail@3v1n0.net> Fri, 05 Oct 2018 00:13:07 +0000

Hello Jean-Baptiste, or anyone else affected,

Accepted ubuntu-themes into bionic-proposed. The package will build now and be available at https://launchpad.net/ubuntu/+source/ubuntu-themes/16.10+18.04.20181005-0ubuntu1 in a few hours, and then in the -proposed repository.

Please help us by testing this new package. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how to enable and use -proposed. Your feedback will aid us getting this update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug, mentioning the version of the package you tested and change the tag from verification-needed-bionic to verification-done-bionic. If it does not fix the bug for you, please add a comment stating that, and change the tag to verification-failed-bionic. In either case, without details of your testing we will not be able to proceed.

Further information regarding the verification process can be found at https://wiki.ubuntu.com/QATeam/PerformingSRUVerification . Thank you in advance for helping!

N.B. The updated package will be released to -updates after the bug(s) fixed by this package have been verified and the package has been in -proposed for a minimum of 7 days.

I tested this package:

$ sha1sum light-themes_16.10+18.04.20181005-0ubuntu1_all.deb
d05d75088b41c7594bf3e4e32879d8950983caec light-themes_16.10+18.04.20181005-0ubuntu1_all.deb

And the bug is indeed fixed for me in virt-manager.

This bug was fixed in the package ubuntu-themes - 16.10+18.04.20181005-0ubuntu1

---------------
ubuntu-themes (16.10+18.04.20181005-0ubuntu1) bionic; urgency=medium

  [ Khurshid Alam ]
  * Remove nonexistent gnome-builder.css (LP: #1773045)

  [ Marco Trevisan (Treviño) ]
  * Radiance: fix typo in assets link for focused buttons (LP: #1781736)
  * Radiance: Use scaled image for buttons border (LP: #1781736)
  * Ambiance, Radiance: don't use padding on window buttons for chromium
    (LP: #1782038)
  * Ambiance: use default foreground color for toolbar menus (LP:
    #1758841)
  * Ambiance, Radiance: show proper arrow in combobox (LP: #1743373)
  * Ambiance, Radiance: use default disabled color for actions headerbar
    buttons (LP: #1785699)
  * Ambiance, Radiance: fix list selected color for gnome-boxes (LP:
    #1761684)
  * Ambiance, Radiance: properly theme disabled and hovered accelerators
    (LP: #1795895)

 -- Marco Trevisan (Treviño) <mail@3v1n0.net> Fri, 05 Oct 2018 00:08:30 +0000

The verification of the Stable Release Update for ubuntu-themes has completed successfully and the package has now been released to -updates. Subsequently, the Ubuntu Stable Release Updates Team is being unsubscribed and will not receive messages about this bug report. In the event that you encounter a regression using the package from -updates please report a new bug using ubuntu-bug and tag the bug report regression-update so we can easily find any regressions.