Bug 525299

Summary: [RFE] Optional lossy encoding for VNC console
Product: [Community] Virtualization Tools Reporter: Daniel <daniel>
Component: virt-managerAssignee: Cole Robinson <crobinso>
Severity: medium Docs Contact:
Priority: low    
Version: unspecifiedCC: crobinso, xen-maint
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Hardware: All   
OS: Linux   
Fixed In Version: Doc Type: Bug Fix
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Last Closed: 2010-03-01 02:04:22 UTC Type: ---
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Description Daniel 2009-09-23 20:24:26 UTC
Description of problem:

Using virt-manager through a slow link makes it really difficult to use the VNC console of KVM/qemu guests. The problem seems to be that virt-manger doesn't attempt to use lossy encoding.
This is also true for virt-viewer.

It'd be great to have an option to reduce the quality so we can use it remotely.

Version-Release number of selected component (if applicable):
virt-manager 0.8
libvirt 0.7.0
qemu-kvm 0.10.6

How reproducible:

Steps to Reproduce:
1. connect to a remote libvirt over a slow link (~300 or 400kbps)
2. open a guest console
3. see how slow it is
Actual results:
Image quality is perfect, but refresh rate is so slow that it's nearly impossible to use

Expected results:
Image quality and colour depth should be reduced when we use slow links.

Additional info:
If automatic selection of the best encoding/colour depth depending on the available bandwidth would really great, we could start with some fixed preset somewhere where we could choose:

- High quality
- Medium quality
- Low quality

either on a per connection basis, or a per guest basis.

Comment 1 Cole Robinson 2010-03-01 02:04:22 UTC

*** This bug has been marked as a duplicate of bug 459783 ***