Comment # 7 on bug 1161720 from Clarence Dillon

So far today, I've had no desktop freezes, which makes me pretty happy. There
are some related problem with the Intel driver that causes other symptoms.

- Booting takes an unusually long time, then open onto a blank screen, which
turns out to be in some power saving mode. Mouse or keyboard wakes the screen
up to a login prompt, but no dots are visible in the fields. Still, I can login
and wait again for the desktop to appear. 

- I'm running on a laptop + docking station + external monitor. After about 60
sec inactivity on either screen, that screen enters a power save mode (fade to
black) which wakes up if I move the mouse to that desktop. This is annoying
since I often read from one screen and work on the other, making me have to
wake up the laptop screen every other minute. 

- Chromium (and all Chrome browser based apps) fail to start. The error is
`libva error: /usr/local/lib/dri/iHD_drv_video.so init failed`. 

Web search shows some others getting the same error recently, but I have not
looked into enough to know whether the cause is related. 

This libva issue is not present on the current TW kernel 5.4.13, at least for
me.