On Sunday 23 September 2007, Mihai Donțu wrote: > On Sunday 23 September 2007, Benjamin Herrenschmidt wrote: > > Heh, yup. > > > > There have been some radeonfb patches around -rc6 or so. Can you try > > backing them out and letting us know if that helps a) ? > > > > In that case, Linus, we probably want to revert them... > > > > Though looking at your PCI ID (5955), I don't think the patches should > > have changed anything. > > After four hours of bisecting, I got this, which dates back to 2.6.21, but > I've been on 2.6.21.3 for too long and thus missed the commit (I just decided > to be a good citizen and test things before they get out). > > dd1447134454b169d5ae353aceb93f2368db8547 is first bad commit > commit dd1447134454b169d5ae353aceb93f2368db8547 > Author: johan henriksson <[EMAIL PROTECTED]> > Date: Tue May 8 00:37:59 2007 -0700 > > radeonfb: Add support for Radeon xpress 200m > > Added support for radeon xpress 200m(rs480). Note that the card doesn't > like dynclk turned on. > > Signed-off-by: Johan Henriksson <[EMAIL PROTECTED]> > Cc: Benjamin Herrenschmidt <[EMAIL PROTECTED]> > Cc: "Antonino A. Daplas" <[EMAIL PROTECTED]> > Signed-off-by: Andrew Morton <[EMAIL PROTECTED]> > Signed-off-by: Linus Torvalds <[EMAIL PROTECTED]> > > :040000 040000 e553664a656ee329152789818b5b071a36ac1e45 > 0a698ad7daa8cdfd9eb5304812845306c9feb2f9 M drivers > > I turned dynclk off, no result (although dynclk is preferred). > > What is interesting, is that the driver ignores "vga=normal" and "jumps" to > a quite high res (I think is 1024x768 or something; the fonts look really nice > though :)).
Something strange is going on here: after I cleaned up the bisect kernels, I booted 2.6.23-rc7 using something like: "vga=normal nohz=on root=/dev/sda7 libata.noacpi=0 pci=assing-busses" and explicitly selecting "Enable Video Mode Handling Helpers" (which normally gets automatically selected once I choose "ATI Radeon display support" but I - suffering from intense paranoia - selected it by hand prior to selecting ATI Radeon ...). I works! X is no longer acting weird. I can't use "vga=791" anymore (the screen goes blank until X loads => timings definitely changed) but it *works* and I don't know why _and_ I can't seem to be able to make it go back to being bad :) I did a diff between the .config used in bisect and the current .config. I don't see anything suspicious. I'll to do a full cleanup and start all over. I'm going to nail this thing down if it's the last thing I do! (so help me God) :) -- Mihai Donțu - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
