Yung Shen, thank you for reporting this and helping make Ubuntu better.
As per http://www.dell.com/support/home/us/en/19/product-
support/product/inspiron-1545/drivers an update to your computer's buggy
and outdated BIOS is available (A14). If you update to this following
https://help.ubuntu.com/community/BIOSUpdate does it change anything?
If it doesn't, could you please both specify what happened, and provide the
output of the following terminal command:
sudo dmidecode -s bios-version && sudo dmidecode -s bios-release-date
Once the BIOS is updated, and the information above is provided, then
please mark this report Status New.
Thank you for your understanding.
** Tags added: bios-outdated-a14
** Changed in: xorg (Ubuntu)
Importance: Undecided => Low
** Changed in: xorg (Ubuntu)
Status: New => Incomplete
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https://bugs.launchpad.net/bugs/1464226
Title:
Rotation in between 180 degrees and normal cause black screen
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