Comment # 1 on bug 1210562 from Takashi Iwai

As far as I tested, the problem isn't seen with TW 6.2.x kernel even with efifb
(nomodeset boot option).  But this is likely because simplefb is used there, so
it's running via DRM, and X modesetting driver is used instead of X fbdev
driver.

So, the behavior likely depends on X driver.