Bug#866629: It seems to an issue with regular bootable non-free iso as well.

[Steve McIntyre <steve@einval.com>]

On Mon, Jul 03, 2017 at 04:19:40AM +0530, shirish शिरीष wrote:
>Dear all,
>
>We were doing a release party for Stretch in Pune when we were hit
>with this bug. Notice the UI, it seems even regular (not just live) is
>also hit with the same bug.  The picture was captured by Gaurav. As we
>were in midst of things, I forgot to see what messages were coming on
>the console. The one which we were using is amd64 iso-non-free (for
>drivers)

Hi Shirish,

I've just tested locally using

http://cdimage.debian.org/cdimage/unofficial/non-free/cd-including-firmware/9.0.0+nonfree/amd64/iso-cd/firmware-9.0.0-amd64-netinst.iso

and I see no such issue. Are you *sure* you weren't using a live image?

-- 
Steve McIntyre, Cambridge, UK.                                steve@einval.com
Can't keep my eyes from the circling sky,
Tongue-tied & twisted, Just an earth-bound misfit, I...