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Bug 2030836 - [machines] VNC console does not register click events under certain conditions on Firefox 94
Summary: [machines] VNC console does not register click events under certain condition...
Alias: None
Product: Red Hat Enterprise Linux 8
Classification: Red Hat
Component: cockpit-appstream
Version: 8.5
Hardware: All
OS: Linux
Target Milestone: rc
: 8.9
Assignee: Nobody
QA Contact: Xianghua Chen
Daniel Vozenilek
Depends On:
TreeView+ depends on / blocked
Reported: 2021-12-09 20:32 UTC by Steve Barcomb
Modified: 2023-11-14 16:13 UTC (History)
7 users (show)

Fixed In Version: cockpit-appstream-290-1.el8
Doc Type: Bug Fix
Doc Text:
.VNC console now works at most resolutions Previously, when using the Virtual Network Computing (VNC) console under certain display resolutions, a mouse offset problem was present or only a part of the interface was visible. Consequently, using the VNC console was not possible. With this update, the problem has been fixed and the VNC console works correctly at most resolutions, with the exception of ultra high resolutions, such as 3840x2160. Note that a small offset between the recorded and displayed positions of the cursor might still be present. However, this does not significantly impact the usability of the VNC console.
Clone Of:
Last Closed: 2023-11-14 15:26:16 UTC
Type: Bug
Target Upstream Version:

Attachments (Terms of Use)

System ID Private Priority Status Summary Last Updated
Red Hat Issue Tracker RHELPLAN-105301 0 None None None 2021-12-09 21:59:47 UTC
Red Hat Product Errata RHBA-2023:6924 0 None None None 2023-11-14 15:26:26 UTC

Description Steve Barcomb 2021-12-09 20:32:37 UTC
Using cockpit machines on RHEL 8.5 some UI elements for virtual machines are not clickable.

1) The small window in the overview pane does not respond to click events at all.  Keyboard events work fine.

2) When using the VNC console in the webview if the default resolution is changed to 1920x1080, the further the mouse pointer drifts from 0x,0y the click events stop working.  The UI elements cannot be clicked to change the resolution back to the default 1024x768, you need to use virt manager to restore functionality.


Comment 2 Martin Pitt 2021-12-10 06:03:47 UTC
Simon, can you please try to reproduce this? It sounds like a bug in https://www.npmjs.com/package/@patternfly/react-console and novnc, that should be validated and reported. Thanks!

Comment 3 Xianghua Chen 2022-05-16 06:51:16 UTC
I guess this bug has the same root cause with https://bugzilla.redhat.com/show_bug.cgi?id=1913548 , I can reproduce it with resolution "1920*1080", expand it then we can click.
Please also check whether the further fix for 1913548 would cover this.

Comment 9 Simon Kobyda 2023-03-16 13:46:31 UTC
Fix merged: https://github.com/cockpit-project/cockpit-machines/pull/900

Comment 15 Xianghua Chen 2023-04-24 06:55:35 UTC
Verified with packages:

Steps to Reproduce:
1. Set resolution to 1920x1080
2. Open firefox, click "Create VM", Download an OS and choose like Fedora 36 to install.
3. During the installation, click the content per the installation guide in Console tab, click works fine
4. Expand the Console into a separate page, click works fine

So verified.

Comment 19 Xianghua Chen 2023-10-24 03:09:20 UTC
Hi Parth, I think we can remove this known issue from RHEL8.9&RHEL9.3 release note now since they are fixed now. Thank you.

Comment 20 Parth Shah 2023-10-30 05:46:09 UTC
Hello @xchen,

I have moved to a different team. Daniel from Virt docs should be able to help out.

Hi Dan, 
Could you please help out with this BZ?


Comment 28 errata-xmlrpc 2023-11-14 15:26:16 UTC
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory (cockpit-appstream bug fix and enhancement update), and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.


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