Bug 2076390

Summary:	Ctrl/Alt modifiers often stuck after pressing Alt+Tab or Ctrl+Alt+Tab and then scrolling/clicking
Product:	[Fedora] Fedora	Reporter:	Kamil Páral <kparal>
Component:	gnome-shell	Assignee:	Florian Müllner <fmuellner>
Status:	CLOSED ERRATA	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	unspecified	Docs Contact:
Priority:	unspecified
Version:	36	CC:	adscvr, awilliam, fmuellner, gnome-sig, jadahl, otaylor, philip.wyett, robatino
Target Milestone:	---
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:	AcceptedBlocker
Fixed In Version:		Doc Type:	If docs needed, set a value
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Last Closed:	2022-04-20 23:29:47 UTC	Type:	Bug
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:
Bug Blocks:	1953785

Description Kamil Páral 2022-04-18 21:45:49 UTC

Description of problem:
If I press Alt+Tab to switch windows and then scroll the wheel, often it happens that the content is not scrolled at all, as if the scroll events were ignored. After some experimentation, I found out that Alt+scroll events are sent instead of regular (without modifiers) scroll events [1].

Similarly, if I press Ctrl+Alt+Tab [2] and then scroll the wheel, often it happens that the content is either not scrolled (if Alt got stuck) or it is zoomed instead (if Ctrl got stuck). It seems random which modifier gets stuck, but again instead of regular scroll events, Ctrl+scroll or Alt+scroll is sent instead [3].

Please read the full description at this upstream report:
https://gitlab.gnome.org/GNOME/gnome-shell/-/issues/5364

Comment 1 Kamil Páral 2022-04-18 22:01:01 UTC

Proposing for a blocker discussion. I think having modifiers stuck is pretty bad, it can do a lot of unexpected things. Alt+Tab is used by people all the time, and sending Alt+scroll or Alt+click randomly can affect how apps behave ("scrolling not working" is probably one of the better outcomes). Ctrl+Alt+Tab is probably not used by people much (unless you remap it as I did), but the zooming effect is very visible, unexpected and annoying. I described only two shortcuts and a handful of apps where you can see a negative impact, but in the real world, this problem might affect many more use cases.

Comment 2 Adam Williamson 2022-04-19 16:16:29 UTC

Upstream issue refers to another upstream issue and an MR, so marking as POST.

Comment 3 Adam Williamson 2022-04-19 16:16:55 UTC

+4 blocker in https://pagure.io/fedora-qa/blocker-review/issue/765 , marking as accepted.

Comment 4 Fedora Update System 2022-04-19 23:10:30 UTC

FEDORA-2022-e822ccefac has been submitted as an update to Fedora 36. https://bodhi.fedoraproject.org/updates/FEDORA-2022-e822ccefac

Comment 5 Kamil Páral 2022-04-20 07:40:44 UTC

(In reply to Fedora Update System from comment #4)
> FEDORA-2022-e822ccefac has been submitted as an update to Fedora 36.
> https://bodhi.fedoraproject.org/updates/FEDORA-2022-e822ccefac

Works!

Comment 6 Fedora Update System 2022-04-20 15:30:51 UTC

FEDORA-2022-e822ccefac has been pushed to the Fedora 36 testing repository.
Soon you'll be able to install the update with the following command:
`sudo dnf upgrade --enablerepo=updates-testing --advisory=FEDORA-2022-e822ccefac`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2022-e822ccefac

See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.

Comment 7 Fedora Update System 2022-04-20 23:29:47 UTC

FEDORA-2022-e822ccefac has been pushed to the Fedora 36 stable repository.
If problem still persists, please make note of it in this bug report.