At Thu, 29 Mar 2012 09:57:41 -0700, Keith Packard wrote: > > <#part sign=pgpmime> > On Thu, 29 Mar 2012 18:12:56 +0200, Takashi Iwai <tiwai at suse.de> wrote: > > > The strange thing is that, although you can recover the display by > > turning off LVDS and on again once when the problem happens, but then > > the display starts flickering. And, the flickering continues even > > after reboot on BIOS boot screen. > > Yeah, it's clearly the panel which is confused. It would be nice to know > what happened to the LVDS signal which caused this problem with the > panel. I'll try to poke someone in HP. > > BTW, now I tested to disable LVDS unconditionally on different > > platforms as Daniel suggested. All worked fine, and I saw no > > regressions. Tested on IVY, SNB, ILK, GM45 and PineView. > > That's not surprising -- pre-PCH platforms disabled the LVDS > anyways. > > I wonder if we could fix this by being more careful about the order of > register operations during LVDS mode setting... Sure, that'd be a preferred option. If you have any easy test in mind, let me know. thanks, Takashi
