| Summary: | When KMS is enabled, radeon module freezes system on load | ||
|---|---|---|---|
| Product: | xorg | Reporter: | Lucas Paul <reilithion> |
| Component: | Driver/Radeon | Assignee: | xf86-video-ati maintainers <xorg-driver-ati> |
| Status: | RESOLVED FIXED | QA Contact: | Xorg Project Team <xorg-team> |
| Severity: | normal | ||
| Priority: | medium | ||
| Version: | unspecified | ||
| Hardware: | All | ||
| OS: | Linux (All) | ||
| Whiteboard: | |||
| i915 platform: | i915 features: | ||
I've pushed a new drm-fixes tree with a possible fix for this http://git.kernel.org/?p=linux/kernel/git/airlied/drm-2.6.git;a=commit;h=56d29d81e729532e4fdbf3c06a3222535f52c936 Please either try the drm-fixes tree or this patch on top of Linus. (In reply to comment #1) > I've pushed a new drm-fixes tree with a possible fix for this > > http://git.kernel.org/?p=linux/kernel/git/airlied/drm-2.6.git;a=commit;h=56d29d81e729532e4fdbf3c06a3222535f52c936 > > Please either try the drm-fixes tree or this patch on top of Linus. Yes. That patch appears to fix the issue. Thank you. |
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On some systems, when kernel mode-setting is enabled, attempting to load the radeon module at any time will cause the system to freeze and become non-responsive. If the radeon module is compiled into the kernel, the system will freeze during boot. This bug was introduced in commit 6a9ee8a to the Linux kernel (affecting users of any kernel later than version 2.6.33). Commenting out the following lines in drivers/gpu/drm/radeon/radeon_bios.c will work around the issue: if (r == false) r = igp_read_bios_from_vram(rdev); According to Dave Airlie: Its trying to read the BIOS from VRAM, but the GPU probably isn't posted yet, so the VRAM isn't setup. We used to check for that only on IGP chips, but I've see the BIOS in VRAM on the switcheroo machines as well so I dropped the check for IGPs but broke unposted GPUs