Brightness adjustment does not work after suspend

So the problem is that when I log in after suspend the brightness adjustment doesn’t work. I have laptop Acer Apire v3-551 with integrated video card. Also I use proprietary driver.
I’ve tried to send the acpi_osi=Linux acpi_backlight=vendor to the kernel, but it didn’t help.

I would update the kernel. A number of Acer issues have been resolved in the newer kernel.

Here’s the repo: