Bug#554493: Bug#551646: installation-reports: [i386] installation failed using netboot
> Wanted to install a stable Debian version on a Vaio (PCG-GRT816S) with
> XPE and a netboot, I've been faced to a similar bug as #497212!
> The screen turn black!
We've had another report of possibly the same issue where the cause was
identified. It's a known limitation of syslinux, which is documented in
the installation guide. See the "Note" here:
What tftp server were you using? Does it work if you switch to tftpd-hpa.
Sorry for the late reply.