A week ago I purchased Efika MX smartbook and I found that it is really useful and nice device for me. I'm very pleased with it overall.
However there is a small problem with my display. For some reason, on default backlight settings, the display makes a noise which is really annoying to me. I'm not sure most people can easily hear it, but I do and it's considerably more noticeable than on other laptops I own.
The problem was solved after I put brightness on maximum level. When it's on maximum, the noise disappears (or it almost disappears, but the point is it doesn't matter anymore). It also disappears if I put brightness on very low level.
I had to turn off "Reduce backlight brightness" and "Dim display when idle" boxes in "Power Management", because otherwise it reduces brightness to precisely the level where it makes most noise.
The high brightness is absolutely ok for me, in fact my eyes like it more than half-dimmed display...
But there is the following problem - when the laptop goes to sleep, it turns off the screen, but the backlight is left turned on and on maximum level. So it's kind of inefficient in terms of battery and it just looks weird, since it's a black screen with backlight turned on.
I wonder if there is any way to adjust it that when it goes to sleep, it turns off backlight as well. There seem not to be an easy way to configure this in power management, but maybe it's possible to do it manually? I'm not very savvy about Linux configuration files, so I would like to ask people here, if they know how it can be done, if it can be done at all.
We're looking into the backlight bug. It's definitely a bug; but I am not sure where it came from (nothing changed in backlight handling for a fairly reasonable amount of time). It may be down to an Ubuntu software update (gnome-power-manager or the X server).
Matt Sealey, Genesi USA Inc.
Product Development Analyst