The laptop is an HP 15-ab153nr. Specs: http://support.hp.com/us-en/product/HP-Pavilion-15-Notebook-PC- series/8499302/model/8857403/document/c04773160/
I'm not certain what specific update caused the black screen issue to appear. I know that the problem first appeared between Jan 23 and Feb 1 2016 as I mentioned it in another bug report: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1537308 I was frequently updating the machine in that time frame trying to resolve the other issue, and I recall it taking a couple days to track down the nomodeset workaround, so probably closer to the 23rd. I upgraded from 15.04 to 15.10, and rebooted a couple times without incident. The additional symptoms occurred immediately after the upgrade to 16.04 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1596216 Title: Black screen on boot; no modeset workaround broken by 16.04 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1596216/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
