[Bug 76146] New: intel-virtual-output virtual screens behaving strangely.

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=76146

          Priority: medium
            Bug ID: 76146
          Assignee: chris at chris-wilson.co.uk
           Summary: intel-virtual-output virtual screens behaving
                    strangely.
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
          Severity: normal
    Classification: Unclassified
                OS: Linux (All)
          Reporter: bugzilla at kraln.com
          Hardware: x86-64 (AMD64)
            Status: NEW
           Version: git
         Component: Driver/intel
           Product: xorg

Created attachment 95746
  --> https://bugs.freedesktop.org/attachment.cgi?id=95746&action=edit
Picture of the displays in question

I have a lenovo T430 (see attached dmesg, etc.) with 'optimus'.

I wish to attach two external monitors. Helpfully, these are wired to the
nvidia chip, and as such I am using intel-virtual-output to drive these
screens.

However, it appears there's something funny with the randr proxy. When I enable
one screen, everything works as expected. When I enable two screens, they are
tied together in strange ways: 
1) Rotation of one virtual screen affects the other virtual screen
2) The virtual screens are always a 'clone', and when I would expect there to
be 'extended' desktop, the (same) view on both monitors pans to follow my
cursor. 

Please see attachments.

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