[Qemu-devel] [Bug 1802915] [NEW] GTK display refresh rate is throttled

[Chen Zhang]

Public bug reported:

Guest OS running with GL enabled GTK display shows a reduced refresh
rate, e.g. moving cursor around with iGVT-g DMA Buf.

It seems that a default refresh interval GUI_REFRESH_INTERVAL_DEFAULT
(30ms) is defined in include/ui/console.h, throttling the display
refresh rate at 33Hz.

To correct this throttle issue, a shorter interval should be applied to
display change listener or the default value should be used.

** Affects: qemu
     Importance: Undecided
         Status: New


** Tags: gtk ui

** Attachment added: "slow motion of a throttled windows guest"
   https://bugs.launchpad.net/bugs/1802915/+attachment/5211842/+files/guest.mov

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https://bugs.launchpad.net/bugs/1802915

Title:
  GTK display refresh rate is throttled

Status in QEMU:
  New

Bug description:
  Guest OS running with GL enabled GTK display shows a reduced refresh
  rate, e.g. moving cursor around with iGVT-g DMA Buf.

  It seems that a default refresh interval GUI_REFRESH_INTERVAL_DEFAULT
  (30ms) is defined in include/ui/console.h, throttling the display
  refresh rate at 33Hz.

  To correct this throttle issue, a shorter interval should be applied
  to display change listener or the default value should be used.

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