As the summary says, commit 86cb2bbfda2cf402aee46779ee90bbb7d915482b (drm/radeon/kms: use lcd pll limits when available) in drm-radeon-testing produces unwatchable fuzziness on my laptop screen (toshiba a300, hd3470 mobility). Reverting the commit brings the laptop back to an usable state.
Some system info was already attached at the (old, similar, fixed) bug
Created attachment 34076 [details] [review]
remove lvds quirks
Perhaps with the new code the quirk from the other bug isn't necessary. Does this patch help? It removes the LVDS quirks.
i confirm, with the pll limits patch, i doesn't need the lvds quirk for my dell studio laptop 15.
seems to be working here as well, thanks!
*** Bug 27106 has been marked as a duplicate of this bug. ***
Created attachment 34106 [details] [review]
disable lcd pll code
I suspect the pll algo fixes are actually what fixed things. Can you try this patch as well (in addition to the previous one)?
Both patches together work for my duplicate T500 bug.
the second patch didn't break anything here as well :)
I've sent the combined patch to Dave. thanks!