Bug 1008760
| Summary: | Starting with kernel-PAE-3.12.0-0.rc0.git24.1.fc21.i686 using radeon.agpmode=-1 blocks kms which blocks X | ||||||||
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| Product: | [Fedora] Fedora | Reporter: | Bruno Wolff III <bruno> | ||||||
| Component: | kernel | Assignee: | Kernel Maintainer List <kernel-maint> | ||||||
| Status: | CLOSED RAWHIDE | QA Contact: | Fedora Extras Quality Assurance <extras-qa> | ||||||
| Severity: | unspecified | Docs Contact: | |||||||
| Priority: | unspecified | ||||||||
| Version: | rawhide | CC: | bruno, gansalmon, itamar, jonathan, kernel-maint, madhu.chinakonda, marcelo.barbosa, skottler, xgl-maint | ||||||
| Target Milestone: | --- | ||||||||
| Target Release: | --- | ||||||||
| Hardware: | Unspecified | ||||||||
| OS: | Unspecified | ||||||||
| Whiteboard: | |||||||||
| Fixed In Version: | Doc Type: | Bug Fix | |||||||
| Doc Text: | Story Points: | --- | |||||||
| Clone Of: | Environment: | ||||||||
| Last Closed: | 2013-09-30 03:13:04 UTC | Type: | Bug | ||||||
| Regression: | --- | Mount Type: | --- | ||||||
| Documentation: | --- | CRM: | |||||||
| Verified Versions: | Category: | --- | |||||||
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |||||||
| Cloudforms Team: | --- | Target Upstream Version: | |||||||
| Embargoed: | |||||||||
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Description
Bruno Wolff III
2013-09-17 03:12:40 UTC
The x86_64 system is really f20 with a nodebug rawhide kernel, the i686 system is a normal rawhide system. I am still seeing this with kernel-PAE-3.12.0-0.rc1.git0.1.fc21.i686. I am using systemd-207-3 now, but that doesn't seem to make a difference either way. The problem existed with kernel-PAE-3.12.0-0.rc0.git24.1.fc21. git23 failed to build in koji, so I can test that one. The problem still exists with kernel-PAE-3.12.0-0.rc1.git2.1.fc21. I'm going to attach some logs from X and kdm that might shed a bit more light on things. Created attachment 799724 [details]
kdm log output
Created attachment 799725 [details]
X log output
In comment 3, that should have been that I can't test the git23 build. It looks like this is related to using radeon.agpmode=-1 as a boot parameter. I need this because of bug 662312, which seems to still affect me. When I booted without radeon.agpmode=-1 I didn't have the problem with kms not working (blocking X from started), but shortly after logging into to xfce, all I could do was move the mouse pointer around which was a symptom of bug 662312. I hadn't tested that bug in quite a while, but it does still seem to be a problem. I ran git whatchanged d5d04bb..3711d86 which I think should list the changes between git22 and git24 and I didn't see any that looked like radeon graphics driver changes. There were some PCI changes and maybe one of those broken using the radeon driver in PCI mode as a side effect. I filed an upstream bug for this (https://bugzilla.kernel.org/show_bug.cgi?id=61811). Another error message that seems to be related that is showing up in dmesg output is "radeon: `-1' invalid for parameter `agpmode'". Also, after a bit of learning, I am working at doing a bisect to find the commit that changed the behavior. If I don't run into any problems, I'll probably be done on Monday. Turns out this is an argument parsing bug, not a video driver bug. At least one other person reported a similar problem with a totally different type of device. I tested a proposed fix against 3.12-rc2 and it works. I'll close this once I see the fix show up in Fedora. I think we can let it flow in normally unless other people start having trouble as well. (The issue was with a change from strict_strto*() to kstrto*() that had some mistakes in it. The fix was posted on a powerpc list. You can look at the upstream bug for more info.) Commit 3a126f85e015701e56240884f27f97543580d5f7, which fixes this, is now in Linus' tree. This is fixed in kernel-PAE-3.12.0-0.rc2.git4.1.fc21.i686. |