https://bugs.freedesktop.org/show_bug.cgi?id=73788
--- Comment #5 from Stepan Bakshaev step2back+freedesktop@gmail.com --- (In reply to comment #4)
Is this a regression? Was dpm working previously at some point, if so when?
Alex, I want to check this. What should I start from? You added si_dpm.c at 2013-06-27 (https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/log/drivers/...). Were there another system to change power management before? Is it enought to find first stable version available in ubuntu repo with si_dpm.c? Or should I use kernel from git and start bisect by history of si_dpm.c?