On Fri, 2010-03-12 at 18:25 -0700, Pete Zaitcev wrote: > On Thu, 11 Mar 2010 00:33:58 -0700, Pete Zaitcev <zait...@redhat.com> wrote: > > I apologise for answering to myself, but while there was no answer, > git bisect found the offending commit and I verified that it was > the culprit. Also, I am adding Bjorn and Jesse to cc:. > > > I seem to hit a sudden regression in 2.6.34-rc1: the modeset fails. > > On this box it also means, no way to start X, which is unfortunate.
Thanks for the report. Would you mind posting the entire dmesg log, /proc/iomem contents, and "lspci -vv" output somewhere (maybe in bugzilla)? The quote below isn't enough for me to see the problem, but http://bugzilla.kernel.org/show_bug.cgi?id=15480 is another regression related to this commit. There are some patches for that one here: http://lkml.org/lkml/2010/3/11/512, but without knowing more about the problem you're seeing, I don't want to waste your time trying them. Bjorn > > Here's a quote from bad dmesg (truncated front and back for brievity): > > > > Linux agpgart interface v0.103 > > agpgart-intel 0000:00:00.0: Intel HD Graphics Chipset > > agpgart-intel 0000:00:00.0: detected 131068K stolen memory > > agpgart-intel 0000:00:00.0: AGP aperture is 256M @ 0xd0000000 > > tpm_tis 00:09: 1.2 TPM (device-id 0xB, rev-id 16) > > Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled > > ................ > > udev: starting version 151 > > [drm] Initialized drm 1.1.0 20060810 > > i915 0000:00:02.0: PCI INT A -> GSI 16 (level, low) -> IRQ 16 > > i915 0000:00:02.0: setting latency timer to 64 > > alloc irq_desc for 33 on node -1 > > alloc kstat_irqs on node -1 > > i915 0000:00:02.0: irq 33 for MSI/MSI-X > > [drm] set up 127M of stolen space > > [drm:i915_gem_init_ringbuffer] *ERROR* Ring head not reset to zero ctl > > ffffffff head ffffffff tail ffffffff start ffffffff > > [drm:i915_gem_init_ringbuffer] *ERROR* Ring head forced to zero ctl > > ffffffff head ffffffff tail ffffffff start ffffffff > > [drm:i915_gem_init_ringbuffer] *ERROR* Ring initialization failed ctl > > ffffffff head ffffffff tail ffffffff start ffffffff > > [drm:i915_driver_load] *ERROR* failed to init modeset > > i915: probe of 0000:00:02.0 failed with error -5 > > dracut: Starting plymouth daemon > > ... > > The commit follows appended. > > It's possible that the BIOS on this motherboard is not up to snuff, > but the 2.6.33-rc8 worked fine, so clearly Linux can do it... right? > > Cheers, > -- Pete > > commit 7bc5e3f2be32ae6fb0c74cd0f707f986b3a01a26 > Author: Bjorn Helgaas <bjorn.helg...@hp.com> > Date: Tue Feb 23 10:24:41 2010 -0700 > > x86/PCI: use host bridge _CRS info by default on 2008 and newer machines ... ------------------------------------------------------------------------------ Download Intel® Parallel Studio Eval Try the new software tools for yourself. Speed compiling, find bugs proactively, and fine-tune applications for parallel performance. See why Intel Parallel Studio got high marks during beta. http://p.sf.net/sfu/intel-sw-dev -- _______________________________________________ Dri-devel mailing list Dri-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/dri-devel
