On Wed, Jan 11, 2006 at 11:28:27AM +0100, maximilian attems wrote: > > > > Sigh, can't get a break with alpha kernel support around here. After > > > > upgrading to 2.6.14 (from 2.4.27), the Matrox framebuffer no longer works > > > > correctly on my alpha with a Matrox Millenium II. The matroxfb_base module > > > > loads without error, but gives me corrupt video output only. > > > Try turning off acceleration. > > Doesn't make a difference. > > What did make a difference was, after googling, loading fbcon manually > > before loading matroxfb_base. Given that I'm loading matroxfb_base by hand > > (/etc/modules), it's not getting loaded via udev or anything like that, it > > seems to me that it's my responsibility to load fbcon by hand as well, but > > it's still something of an unexpected change from 2.4. It might be nice to > > have these modules all autoloaded by something, but it's not strictly > > necessary, and some users may not want the framebuffer activated > > automatically? > > The other issue (and the first thing I was trying to get work, which led me > > to believe the fb was completely broken) is that, even though console works > > on the framebuffer now, X does not. This breakage corresponds to the kernel > > upgrade, not to any changes in X, so still looks like a kernel bug to me. > > If I turn off "UseFBDev" in my xorg.conf, X displays correctly. I haven't > > poked yet to see what this does performance-wise. > 2.6.15 has matroxfb patches, did it make a difference on your box? Don't know yet, thanks to bug #347556. :) On Wed, Jan 11, 2006 at 07:24:04PM +0800, Antonino A. Daplas wrote: > >> It might be nice to > >> have these modules all autoloaded by something, but it's not strictly > >> necessary, and some users may not want the framebuffer activated > >> automatically? > As long as fbcon is compiled statically, you'll get the same 2.4 behavior. <nod> I leave it to Norbert to decide what the policy should be for fbcon in the alpha kernel images. > >> The other issue (and the first thing I was trying to get work, which led me > >> to believe the fb was completely broken) is that, even though console works > >> on the framebuffer now, X does not. This breakage corresponds to the kernel > >> upgrade, not to any changes in X, so still looks like a kernel bug to me. > >> If I turn off "UseFBDev" in my xorg.conf, X displays correctly. I haven't > >> poked yet to see what this does performance-wise. > The "UseFBDev" option was added to X so it can cooperate with fbcon (ie, allows > X to restore the console state by using the fbdev API ). In 2.6, fbcon has its > own way of restoring its own state so the "UseFBDev" option is not needed, and in > your case, is counterproductive. Aha, didn't know that. It had been my impression that this option meant using the fbdev API for all vidcard access; but I guess that's the fbdev driver, anyway. So the real target for all of this was to get matroxfb working to the point of running bterm successfully from the debian installer; and even with fbcon working, in 2.6.14 running bterm or fbi gives me a whole lot of nothing (console blanks, nothing gets displayed). I'll give this another try with 2.6.15 once I've got my /usr partition mounting again. -- Steve Langasek Give me a lever long enough and a Free OS Debian Developer to set it on, and I can move the world. vorlon@debian.org http://www.debian.org/
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