Not sure what happened or whoever did the magic, but the problem is gone
on Ubuntu 16.04, somewhere between the end of August and the first two
weeks of September. Moving images are as fast as it used to be (and
should be). I tested moving 1,000+ JPG files several times and it
happened instantly. I
Dell E7440, same problem on 14.04: very quick to change brightness using
intel_backlight command, but hardward keys (Fn-Up/Down) pause the
computer briefly.
Thanks to instruction from user Toz
(http://ubuntuforums.org/showthread.php?t=2208278), the fix requires both
"acpi_backlight=vendor" kerne
Workaround found on Ubuntuforum:
http://ubuntuforums.org/showthread.php?t=342775
To manually save my panel layout once:
gconftool-2 --dump /apps/panel > panel_layout_1280_800.entries
and restore the layout after switching back from a different resolution:
gconftool-2 --load panel_layout_1280_800
This is really annoying, especially my little one plays Chilsplay and
Gcompris regularly (switching back and forth between 1024x768 and
1440x900). Some issues to address:
- if the resolution goes from high to low, what if all the items won't fit on
the lower resolution.
- if the resolution goes f
