| Summary: | circular locking, switcheroo-cont/889 is trying to acquire lock vga_switchto_stage2, but vga_switcheroo_debugfs_write already has lock | ||||||||||||
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| Product: | DRI | Reporter: | Chris Murphy <bugzilla> | ||||||||||
| Component: | DRM/other | Assignee: | Default DRI bug account <dri-devel> | ||||||||||
| Status: | RESOLVED INVALID | QA Contact: | |||||||||||
| Severity: | normal | ||||||||||||
| Priority: | medium | ||||||||||||
| Version: | unspecified | ||||||||||||
| Hardware: | Other | ||||||||||||
| OS: | All | ||||||||||||
| Whiteboard: | |||||||||||||
| i915 platform: | i915 features: | ||||||||||||
| Attachments: |
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Created attachment 137286 [details]
dmesg.log
Created attachment 137287 [details]
journalctl -b -o short-monotonic
Created attachment 137288 [details]
lspci -vvnn
Created attachment 137289 [details]
dmidecode
Still happens in 4.16.0-0.rc4.git3.1.fc29.x86_64 which is git 1b88accf6a65. Hi, Freedesktop's Bugzilla instance is EOLed and open bugs are about to be migrated to http://gitlab.freedesktop.org. To avoid migrating out of date bugs, I am now closing all the bugs that did not see any activity in the past year. If the issue is still happening, please create a new bug in the relevant project at https://gitlab.freedesktop.org/drm (use misc by default). Sorry about the noise! |
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4.16.0-0.rc0.git9.1.fc28.x86_64 which is "linux-next" git f9f1e414128e [ 9.523799] switcheroo-cont/889 is trying to acquire lock: [ 9.523799] (console_lock){+.+.}, at: [<000000002c1cc7fb>] vga_switchto_stage2+0x93/0x130 [ 9.523806] but task is already holding lock: [ 9.523807] (vgasr_mutex){+.+.}, at: [<000000007e504e29>] vga_switcheroo_debugfs_write+0x6b/0x360 [ 9.523810] which lock already depends on the new lock. [ 9.523810] the existing dependency chain (in reverse order) is: [ 9.523810] -> #3 (vgasr_mutex){+.+.}: [ 9.523812] -> #2 (&helper->lock){+.+.}: [ 9.523814] -> #1 ((fb_notifier_list).rwsem){++++}: [ 9.523816] -> #0 (console_lock){+.+.}: [ 9.523818] other info that might help us debug this: [ 9.523818] Chain exists of: console_lock --> &helper->lock --> vgasr_mutex