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I have installed ubuntu 14.04 in my intel-z3735f baytrail tablet. I can boot this device and get the desktop only with nomodeset parameter.(When booted without nomodeset getting blank screen) But when I boot in this mode I am not able to use xrandr utility to rotate my desktop. I urgently need to rotate my screen, Thanks in advance for the help.

Below is the log I am getting on running command xrand from terminal.

sanj@sanj-laptop:~$ xrandr
xrandr: Failed to get size of gamma for output default
Screen 0: minimum 800 x 1280, current 800 x 1280, maximum 800 x 1280
default connected primary 800x1280+0+0 0mm x 0mm
   800x1280       77.0* 
sanj@sanj-laptop:~$
Sanjeev Kumar
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1 Answers1

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I was having the same problem on my laptop. It has Intel i5-7300hq and an Nvidia 1050Ti. I have been running the open source drivers which had the nomodeset option. The fix was to remove the nomodeset option but add acpi_osi=! acpi_osi="Windows 2009".

Note that when I was running the Nvidia proprietary drivers on a previous installation, I still had to add the acpi_osi=! acpi_osi="Windows 2009" despite the nomodeset parameter not being there. Otherwise the laptop had problems if I elected to switch to the Intel iGPU from the driver/PRIME settings, like the laptop not shuting down.

There are some more information on this post. For example here's a command to suggest what Windows acpi setting you may need to use for your device to work:

$ sudo strings /sys/firmware/acpi/tables/DSDT | grep -i 'windows ' | sort | tail -1
Windows 2015

As you see actually I am being suggested another value from the one that fixes the problem, so feel free to experiment if you can (removing tail from that command will show other available options).

Karsus
  • 961