[lug] Tracing Permission Problems

[Davide Del Vento]

Since it works for root, I doubt you can easily track it down with
gdb. I suspect it's a setting somewhere, the trick is finding where
that somewhere is. Is it application-specific or is it user-specific?
Try creating another user and see if it works ok like it does for root.
Try deleting not only all the cache entries, but also all the KDE and
application specific setting. Then, do not rebuild them from scratch,
but copy them from root. If it fixes it, nail it down with a bisection
search to one file.

[saracasm mode on]
Or try running MATE, instead of KDE, like I started doing after being
frustrated by the KDE and GNOME attempts to convince me that my screen
made of two 24" monitors is just a cell phone and that I should put it
in my pocket.
[sarcasm mode off]

On Thu, Dec 10, 2015 at 9:28 AM,  <stimits at comcast.net> wrote:
> Hi,
>
> I recently installed Fedora 23 with the KDE spin. One of the applications
> I've added and would like to use is kicad. Unfortunately, there seems to be
> a package install permissions issue, or else a system permissions issue. The
> gist is that when the mouse hovers over an icon in kicad, the tool tip text
> appears...but unless I'm running as root, the color is white on white. It
> isn't readable.
>
> I noticed that if I run OpenBox without KDE, there is no issue. Running
> Plasma or OpenBox on KDE causes the tool tips of kicad to ignore KDE tool
> tip settings. Running as root fixes the issue and tool tip colors are
> normal. Other applications display tool tips correctly on KDE, so I'm
> inclined to believe something about the kicad package installed with invalid
> permissions.
>
> I tried to delete and rebuild all possible cache entries, including deleting
> my entire KDE desktop setup and starting from scratch, along with
> customizing specific tool tip color settings in KDE. No difference. I
> figured if it was a file permission, then strace might point it out.
> Unfortunately, after going through a LOT of log text, I never found a
> permission denied.
>
> What I did notice under strace while moving the mouse over icons to pop up
> tool tip text that there were a lot of "EAGAIN" returns (resource
> temporarily unavailable via recvmsg calls). I did this as root as well, but
> never saw anything obviously limited to my non-root user. The actual data on
> the recvmsg calls is binary, and not visible text (perhaps it is UTF8 or
> UTF16 encoding), so I can't be sure any of the "resource temporarily
> unavailable" messages had anything to do with tool tip color.
>
> I am convinced that since this only happens with kicad that KDE itself is
> installed with correct permissions...but how would I trace the source of
> kicad tool tip text color failing? Would I need to actually run a debug
> version of kicad in gdb? It seems like there should be something more
> obvious and simple to test before going to that length.
>
> Thanks!
>
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