| Bug ID | 106456 |
|---|---|
| Summary | [regression][bisected] Mutex deadlock in nouveau (nv50_display.c) |
| Product | DRI |
| Version | DRI git |
| Hardware | x86-64 (AMD64) |
| OS | Linux (All) |
| Status | NEW |
| Severity | major |
| Priority | medium |
| Component | DRM/other |
| Assignee | dri-devel@lists.freedesktop.org |
| Reporter | john@jlindgren.net |
Since linux 4.14, the nouveau driver deadlocks at boot. Downstream report: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1763189?comments=all The culprit is this commit: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=af2405af07d168e2905f2ac9494d3a804a549f0f In short, drm_fb_helper_add_one_connector() and drm_fb_helper_remove_one_connector() were incompatibly changed to add locking of a mutex that previously the caller was expected to lock. The i915 and radeon drivers were updated to no longer lock the mutex, but nouveau was not updated.
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