linux

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Capturing a screenshot of the GDM login screen

by ao2, October 1, 2016

gnome
linux

These days GDM on Debian is running using Wayland, so the classic way of taking a screenshot using the X protocol does not work:

# Sleeping before launching the command allows to switch to the login screen
# before the screen gets actually captured.
#
# Otherwise if the login screen is not visible, only a black image will be
# captured.
sleep 6

sudo -u Debian-gdm\
  DISPLAY=:0 \
  XAUTHORITY=/var/run/user/109/gdm/Xauthority \
  import -display :0 -win root /tmp/GDM-screenshot.png"

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Launching the Windows Recovery Environment

by ao2, August 18, 2016

A friend of mine had a problem with his Windows 10 installation: the system booted but it was unresponsive, so it was not possible to enter the Windows Recovery Environment from Windows.

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Experimenting with Gtk+ theme variants: Adwaita red

by ao2, July 26, 2016

Most Gtk+ themes offer a “light” and a “dark” variant, however I found out that these names are just conventional: a Gtk+ theme can define variants with arbitrary names, so maybe this can be used for some fun stuff.

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libam7xxx-0.1.6 released

by ao2, November 18, 2015

The libam7xxx-0.1.6 release is out; it's a maintenance release with no big new features.

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Linux KMS driver for Acer C120

by ao2, July 8, 2015

Hans de Goede informs me that he has been working on gm12u320-kms: a new linux kernel driver for the Acer C120 mini projector, and possibly other devices based on the Grain Media GM12U320 USB3 bridge chip.

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Teclast X98 Air 3G: unbricking a Bay Trail tablet

by ao2, December 30, 2014

While I was trying to boot a vanilla linux kernel on the Teclast X98 Air 3G I messed up a bit with the UEFI firmware settings: the battery was not recognized anymore, the tablet was rebooting right after showing the UEFI firmware boot screen, and USB-host was not working either; so no keyboard for accessing the firmware menu to restore the default settings, and no ADB for running flashrom or the Intel FPT to reflash the firmware with.

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Teclast X98 Air 3G: cheap Intel Bay Trail tablet, getting acquainted

by ao2, November 21, 2014

I got a Teclast X98 Air 3G tablet from Aliexpress, it costed 168 € ( with free shipping) and has a high-definition screen and it's an Intel Bay Trail device; so Android, x86 architecture, 2GiB of RAM and 32 GiB of storage on EMMC.