On Wed, 2012-02-15 at 03:23 +0100, acrux wrote:
On Sun, 12 Feb 2012 11:00:43 +0100 Michel Dänzer michel@daenzer.net wrote:
On Sam, 2012-02-11 at 21:00 +0100, acrux wrote:
Just a curiosity, i've only two powerpc machines[1] equipped with PCIE videocards and both them are not able to boot with radeonkms. Modern PCI-E videocards are not recognized by the old linux framebuffer subsystem and they solely can be managed by the new KMS frame buffer that doesn't work properly on Power Architecture.
That's too broad a statement, it works fine on other PowerPC machines (PowerMacs, some embedded boards).
hi Michel, thanks a lot for your help, i really appreciate it.
If you say they were tested on real Power Architecture boards with PCIE videocards thus it is reassuring... and i'm happy that you understand my previus assertion wasn't affected by malevolence or sarcasm. Indeed i'm also a bit troubled 'n frustrated thinking that next release of mesa 'll do extend use of llvm (that doesn't work properly on linuxppc and totally untested on linuxppc64)
Btw, to sum up the list of Power Architecture machines with PCIE that aim to be a desktop/workstation: Apple iMac G5 (iSight), Apple PowerMac Quad G5, YDL Powerstation 2x970MP and Acube Sam460ex . And the last two, on present evidence (my attempts), aren't able to boot up if bootkernel has kms enabled.
Which radeon card, kernel log please ? I've successfully booted various reasonably modern radeons on these. I've also used gnome3 with GL acceleration etc... on some of these. Granted that was a few month ago so it's possible that something regressed.
Furthermore the first tree ones can fallback to the legacy OpenFirmware framebuffer and safely get a console.
It looks like there's a problem with accessing the PCIe device memory, and at this point it's not even 100% clear that this is due to a problem in the driver, as opposed to e.g. in the platform code.
it could be the right problem and i've CC BenH that has a better global perspective.
Can you give me more data about the problem please ? It could be a recent regression or some setup problem.
Also I've noticed on the PowerStation some issues where heavy DMA use by a video card will eventually lock up the system. From what I can tell this is an issue with the northbridge, though a Quad G5 with the same bridge (tho not quite the same revision) doesn't show the problem. Could be a configuration issue.
Cheers, Ben.