Bug 55160 – Control elements in the computer list flicker constantly

Bug 55160 - Control elements in the computer list flicker constantly


Summary:	Control elements in the computer list flicker constantly

Status:	CLOSED FIXED

Product:	UCS@school
Classification:	Unclassified
Component:	UMC - Computer room administration
Version:	UCS@school 5.0
Hardware:	Other Linux

Importance:	P5 normal (vote)
Target Milestone:	---
Assigned To:	UCS@school maintainers
QA Contact:

URL:
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Depends on:
Blocks:
	Show dependency tree / graph

Reported:	2022-09-02 09:15 CEST by Christina Scheinig
Modified:	2023-04-21 10:25 CEST (History)
CC List:	4 users (show)

See Also:	55162
What kind of report is it?:	Bug Report
What type of bug is this?:	4: Minor Usability: Impairs usability in secondary scenarios
Who will be affected by this bug?:	2: Will only affect a few installed domains
How will those affected feel about the bug?:	5: Blocking further progress on the daily work
User Pain:	0.229
Enterprise Customer affected?:
School Customer affected?:	Yes
ISV affected?:
Waiting Support:
Flags outvoted (downgraded) after PO Review:
Ticket number:	2022083021000358
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Max CVSS v3 score:

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Description Christina Scheinig

2022-09-02 09:15:00 CEST

UCS@School 5.0 V3 Computerraum-Modul

If at least 1 computer in the computer room is switched on (i.e. accessible to Veyon), the computer list seems to be constantly updated, in such a way that many control elements "flicker" in one tour. The following things happen every 2 seconds:
- The checkboxes of the selected computers reset briefly to "not selected" and then immediately to "selected" again
- The background color "pulses" briefly in a darker shade of gray
- If you scroll further down the computer list with the scroll bar, the computer list is not rendered at all and remains completely empty



The customer has a computerroom with 118 computers in it.
This problem occurs quite often at the school, because there is a "room" at each school with all computers of the school, which is usually used to start or shut down all computers in the school.

Comment 4 Daniel Tröder

2022-09-05 08:16:48 CEST

Update from the customer from Bug 55162

There seems to be a connection between the occurrence of Veyon tracebacks in management-console-module-computerroom.log and the operating problems in the UMC. Because without tracebacks, the flickering (Bug 55160) also stops and, in particular, all computers can actually be checked via the checkbox! (Bug 55162)

Comment 5 Markus Dählmann 2022-10-06 16:58:54 CEST

This also seems to have been solved by the new Veyon app version 4.7.4.14-0!

Comment 6 Jan-Luca Kiok

2023-03-24 11:29:28 CET

Asked for clarification if the issue still persists or if Veyon Proxy version 4.7.4.14 solved it.

Comment 7 Jan-Luca Kiok

2023-03-31 16:05:57 CEST

This bug was reported as resolved with Veyon Proxy version 4.7.4.14.

If this error occurs again, please clone this bug.