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Bug#900317: debian-installer: black screen and no answer from X server

Control: tag -1 pending


Cyril Brulebois <kibi@debian.org> (2018-05-29):
> Going back to the previous linux ABI shows the same behaviour (so both
> 4.16.0-1 and 4.16.0-2 are affected), so I suppose it could be due to the
> new X server. It seems to start at least, since I'm briefly seeing its
> startup logs.
> Interested people could look at images from the last few days and check
> the differences in build logs for further suspects:
>   https://d-i.debian.org/daily-images/amd64/
> For this bug:
>  - OK = ctrl-alt-fN can switch ttys. You'll likely see messages about
>         “random” things (see #898468).
>  - KO = ctrl-alt-fN doesn't seem to have any effects.

Using a serial console I was able to get a shell, and to try and start
Xorg manually, which resulted in a symbol error:
| Xorg: symbol lookup error: /usr/lib/xorg/modules/drivers/fbdev_drv.so: undefined symbol: shadowUpdatePackedWeak

Michel Dänzer kindly pointed to this bug report against the fbdev
driver, which is fixed upstream in 0.5.0:

I've merged the new upstream release locally and rebuilt d-i against it,
and I've verified the bug fix is OK; meanwhile, Julien uploaded the new
upstream release:

Keeping this bug report open for the time being, until the fbdev driver
migrates to testing, so that I don't try to upload d-i too soon…

Cyril Brulebois (kibi@debian.org)            <https://debamax.com/>
D-I release manager -- Release team member -- Freelance Consultant

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