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Bug#845481: installation-reports: stretch alpha8 won't install on MacBookAir. no, suitable video mode found. booting in blind mode.

Package: installation-reports
Severity: important

Dear Maintainer,

   * What led up to the situation?
On a MacbookAir6,2 (2013, Haswell graphics) I booted the installer
( http://cdimage.debian.org/cdimage/stretch_di_alpha8/amd64/iso-dvd/debian-stretch-DI-alpha8-amd64-DVD-1.iso )
from a USB disk from the EFI boot menu without problem.
But quickly, the screen briefly displayed a black screen with the following error message:
error. no suitable video mode found. booting in blind mode.
Quickly, the install menu appeared.
But when selecting either "Install" or "Graphical Install" the previous message is shown once again. Black screen. Period

   * What exactly did you do (or not do) that was effective (or
I edited the grub command line of "Install" menu, adding "nomodeset"

   * What was the outcome of this action?
Not any better. Black screen

   * What outcome did you expect instead?
That the screen displayed something in order to proceed to the installation and get rid of OSX

PS: the following data come from my main computer, not from the one where I bumped into the install bug

-- System Information:
Debian Release: 8.6
  APT prefers stable-updates
  APT policy: (500, 'stable-updates'), (500, 'stable')
Architecture: amd64 (x86_64)

Kernel: Linux 4.7.0-0.bpo.1-amd64 (SMP w/8 CPU cores)
Locale: LANG=fr_FR.UTF-8, LC_CTYPE=fr_FR.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

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