Comment 33 for bug 1492037

(In reply to Samuel Iglesias from comment #20)
> (In reply to Samuel Iglesias from comment #19)
> > I added some
> > traces to that function at libdrm and found that drmIoctl(bufmgr_gem->fd,
> > DRM_IOCTL_GEM_OPEN, &open_arg) is returning an error, so this bug seems to
> > be produced by the kernel driver.
> >
> > My distro is Debian Jessie with a Linux kernel 3.14.

Just my 5 cents:

I had several semi-rare crashes in plasma/kickoff-tooltips a long time ago on suse tumbleweed, but it's stable for a long time now, ~since 3.19 kernel.

As per this comment, this may be an old bug in the kernel, so you should probably test with new *kernels*, not mesa.