RFC: what to do with ums when the X server is not suid root ?

Matthew Garrett mjg59 at srcf.ucam.org
Mon Jan 20 18:40:11 UTC 2014

On Mon, Jan 20, 2014 at 10:19:30AM -0800, Andrew Lutomirski wrote:

> Does uvesafb actually work?  I submitted a patch to the uvesafb kernel
> driver a few months back, and not only is the upstream link [1][2] to
> the v86d helper dead, but no one on the dri-devel list answered my
> request to see if anyone had a copy.  Fedora does not appear to
> package a copy (at least yum whatprovides '*/v86d' doesn't come up
> with anything).  This means that I got a patch into upstream drm and
> that it's quite possible that no one (or maybe a grand total of one
> person) has ever tested.

It'd be pretty straightforward to re-implement the helper if it's 
vanished entirely - we haven't retired libx86, and the rest is pretty 

> Or do you mean the older pre-uvesafb driver?

That's problematic from the "You have to provide a fixed resolution on 
the kernel command line" perspective.

Matthew Garrett | mjg59 at srcf.ucam.org

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