On Sat, 2005-05-14 at 22:59 +0200, Jesus Climent wrote: > Hi > > I got a new PowerBook at work, and after upgrading to 2.6.12-rc4 I am > experiencing some regression problems (I was using 2.6.12-rc3 + sleep > patches). > > The system goes to sleep fine, and usually recovers from the hibernation state > fine, but sometimes I get corruption problems: the screen is mangled in a way > that looks like there are some sync problems with the screen. I can read most > of the characters, but they look like interlaced.
This is a known issue. Another workaround is to bring backlight all the way down to 0 and back up a few times until the screen "catches up". The problem has something to do with the LCD panel powerup sequence. Unfortunately, I don't have any real informations about what should be done in that area, and every time I tweak that code to fix some machines, I break others. Apparently all panel types need a different seuqnce for beeing properly powered up but I don't have those informations. If you want to play around, maybe tweak with the code in radeonfb_unblank that deals with LVDS_GEN_CNTL bits and see if you can get it to work more reliably by adding delays here or there... Ben. -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
