| Summary: | Radeon KMS mis-detects present connectors | ||||||
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| Product: | DRI | Reporter: | Bruno <bonbons> | ||||
| Component: | DRM/Radeon | Assignee: | Default DRI bug account <dri-devel> | ||||
| Status: | RESOLVED NOTABUG | QA Contact: | |||||
| Severity: | normal | ||||||
| Priority: | medium | ||||||
| Version: | XOrg git | ||||||
| Hardware: | x86-64 (AMD64) | ||||||
| OS: | Linux (All) | ||||||
| Whiteboard: | |||||||
| i915 platform: | i915 features: | ||||||
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Description
Bruno
2012-05-19 11:45:15 UTC
Not all of the outputs are usable at the same time. The sbios sets up the available connectors based on what is connected at boot time. (In reply to comment #1) > The sbios sets up the available connectors based on what is connected at boot time. Does this mean that the other connectors are not usable until reboot or does plugging around still work? If so does the list of connectors get updated on hotplug or which connector corresponds to which name depend on what was connected? How does the whole thing behave in the event that something was connected to each connector? (e.g. is it possible to choose using xrandr which of the connectors should effectively be used or does one depend on BIOS's guess?) (In reply to comment #2) > > Does this mean that the other connectors are not usable until reboot or does > plugging around still work? If so does the list of connectors get updated on > hotplug or which connector corresponds to which name depend on what was > connected? The active connector list is fixed once the sbios boots. To change it you have to reboot. Due to the way the ports are wired up, only certain combinations are allowed (as detailed by the manual). > > How does the whole thing behave in the event that something was connected to > each connector? (e.g. is it possible to choose using xrandr which of the > connectors should effectively be used or does one depend on BIOS's guess?) The sbios makes an educated guess if all of the connected are connected on boot. xrandr only knows about the connectors that the driver provides. The driver only knows about the connectors that are enumerated by the sbios at boot. There's no way for the driver to know all of the possible combinations available on any specific board. |
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