[+cc Dave]
On Mon, Sep 23, 2013 at 12:33 PM, Bjorn Helgaas bhelgaas@google.com wrote:
[+cc linux-pci, linux-kernel, dri-devel]
On Sat, Sep 21, 2013 at 11:39 AM, bugzilla-daemon@bugzilla.kernel.org wrote:
https://bugzilla.kernel.org/show_bug.cgi?id=61811
Bug ID: 61811 Summary: kms mode breaks and using radeon.agpmode=-1 Product: Drivers Version: 2.5 Kernel Version: 3.12 Hardware: All OS: Linux Tree: Fedora Status: NEW Severity: normal Priority: P1 Component: PCI Assignee: drivers_pci@kernel-bugs.osdl.org Reporter: bruno@wolff.to Regression: NoI need to use radeon.agpmode=-1 with my rv280 based graphics card due to a long (2+ years) standing bug with the driver. Recently I was no longer able to start X because modesetting is no longer working. At boot I no longer see the resolution change and I got log entries later in Xor.0.log saying "[KMS] drm report modesetting isn't supported." If I boot without radeon.agpmode=-1 X starts, though becomes unusable shortly due to the pre-existing but. kernel-PAE-3.12.0-0.rc0.git22.2.fc21.i686 works for me. kernel-PAE-3.12.0-0.rc0.git24.1.fc21.i686 doesn't work. (git23's build failed so I didn't test that one.) I did a git whatchanged d5d04bb..3711d86 which I think should have showed me the commits that were in git24 and not git22 and I didn't see any specifically directed at the radeon driver. I did see some PCI related commits.
Thanks for the report! Can you attach the complete dmesg logs from the working kernel and the failing one (booted with "radeon.agpmode=-1") to the bugzilla? Also the output of "lspci -vv".
I don't see any obvious PCI issue there, so I reassigned the bugzilla to the video folks.
Bjorn