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Feel free to add any tips or advice for DebConf18-Taiwan presenters. For example, see talk:Advice-for-presenters where there are some unanswered questions. As of February 2018, this is a lightly edited copy of last year's recommendations. Check back often as these recommendations are updated.


[edit] Publishing your slides

Please publish your slides on Debconf-share git annex repository when it is live.[1] In 2017 the way to do that was to have your ssh public key published in your Alioth [2] account and then follow the instructions.[3] Alternatively you could email your presentation. In 2017 the address was [4] and it was eventually added to the repository.

[edit] Display Output

The baseline resolution was 1280x720 for DebConf17, and slides that had a 4:3 aspect ration were to be letterboxed – That meant, if your presentation was not in our baseline resolution, it was adjusted between black bars.

For LaTeX/beamer:


Our video capture system used HDMI. The video team has adaptors to some other formats:

  • micro-HDMI
  • mini-HDMI
  • DVI
  • DP
  • mini-DP
  • USB-C (best-effort, our adaptors are largely untested, and there are several different protocols for video over USB-C)
  • VGA (best-effort, via unreliable adapters)

The VGA-to-HDMI adapters are on a best-effort basis. Those are known to be somewhat unreliable and you are encouraged to test your laptop with them prior to your talk, in order to check whether they are an option. Even after testing, it is wise to have alternate means available such as a PDF on a thumb drive.

If your laptop doesn't have one of the above mentioned digital ports, it's up to you to bring an adapter and ideally test it before bringing it to DebConf:

Presenters are strongly encouraged to test their setup works correctly with our video equipment before their session, either in one of the video team volunteer training sessions or in breaks between talks — Attempting to fix stuff five minutes before your presentation is not fun!

As a last resort, desktop systems have been present as part of the video-team setup, so if you had your talk in PDF format, it could be presented via the desktop system.

[edit] xrandr hints

[edit] USB-C

Apparently you may need to update your thunderbolt firmware to get video to work. DLange or someoone else may have a suitable windows install on a flash drive, to help you.

[edit] 720p VGA mode

# One of these should work:
xrandr --newmode 720p60 74.25  1280 1390 1430 1650 720 725 730 750 +HSync +VSync
xrandr --newmode 720p60-2 74.25 1280 1392 1448 1650 720 722 728 750

# Substitute the mode that works better appropriately in:
xrandr --addmode VGA-1 720p60
xrandr --output VGA-1 --mode 720p60

[edit] Mirroring at non-native LCD resolution

xrandr --output LVDS-1 --scale-from 1280x720 --output HDMI-1 --same-as LVDS-1

[edit] Water

If possible, bring something to drink during the talk. Bottled water is the norm in Taiwan, and should be easily available, but bring your own to your podium. There might be water bottles at the speaker's desk.

[edit] Templates

Debian presentation templates for various architectures, and an archive of previous talks can be found on the main Debian wiki:

[edit] VideoTeam Information

The Videoteam has more information available. Especially their general advice for presenters.[5]

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