[Mesa-dev] [Bug 103699] Latest mesa breaks firefox on kde plasma with compositing on

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=103699

            Bug ID: 103699
           Summary: Latest mesa breaks firefox on kde plasma with
                    compositing on
           Product: Mesa
           Version: git
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Mesa core
          Assignee: mesa-dev at lists.freedesktop.org
          Reporter: sergio.callegari at gmail.com
        QA Contact: mesa-dev at lists.freedesktop.org

Seen on kubuntu artful with kde plasma 5.11.3, using the "oibaf" PPA that
provides the latest (git) mesa over the normal distribution one on an almost
daily basis.

Seen both on intel graphics (haswell) and nvidia graphics (Quadro FX 570 with
nouveau).

Since the last week, mesa breaks firefox when compositing is on in the window
manager. Specifically, the overlays that should appear when pressing toolbar
buttons do not appear any more, nor do alert/confirmation dialogs. Note that
firefox does not use the normal system dialogs, rather some overlays right
below the screen element related to them (a button, an element on the toolbar,
etc.).

Reverting to the system version of mesa fixes the issue.

Unfortunately:

1) I have initially thought that the issue was in firefox itself, so I have not
noted down the day on which git mesa started breaking firefox (should be
between 3/11 and 10/11, approximately, though).

2) I cannot bisect, since I rely on pre-built binaries from an ubuntu PPA.

I certainly see the issue with:

libdrm 2.4.88+git1711110630
mesa 17.4~git1711120730

I do not see it with

libdrm 2.4.83 from ubuntu artful
mesa 17.2.2 from ubuntu artful

Neither I was seeing it with mesa/libdrm from git more than about 1 week ago.

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