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[RELOPS-2325] Remove reboot --force on Ubuntu 24.04 workers#1173

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[RELOPS-2325] Remove reboot --force on Ubuntu 24.04 workers#1173
aerickson wants to merge 3 commits into
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042226-linux-reboot-tweaking

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@aerickson aerickson commented Apr 22, 2026

--force was added in 2020 (bug 1501936) to fix a systemd hang on 18.04.
On 24.04 + kernel 6.8.0+, bypassing systemd's orderly shutdown causes
silent hangs during driver teardown. Test with graceful reboot on 24.04
while leaving 18.04 behavior unchanged.

See https://mozilla-hub.atlassian.net/browse/RELOPS-2325

--force was added in 2020 (bug 1501936) to fix a systemd hang on 18.04.
On 24.04 + kernel 6.8.0+, bypassing systemd's orderly shutdown causes
silent hangs during driver teardown. Test with graceful reboot on 24.04
while leaving 18.04 behavior unchanged.
@aerickson aerickson changed the title Remove reboot --force on Ubuntu 24.04 workers RELOPS-2325: Remove reboot --force on Ubuntu 24.04 workers Apr 22, 2026
@aerickson aerickson changed the title RELOPS-2325: Remove reboot --force on Ubuntu 24.04 workers [RELOPS-2325]: Remove reboot --force on Ubuntu 24.04 workers Apr 22, 2026
@aerickson aerickson marked this pull request as ready for review April 22, 2026 07:57
@aerickson aerickson closed this Apr 22, 2026
@aerickson aerickson reopened this Apr 22, 2026
@aerickson aerickson changed the title [RELOPS-2325]: Remove reboot --force on Ubuntu 24.04 workers [RELOPS-2325] Remove reboot --force on Ubuntu 24.04 workers Apr 22, 2026
@aerickson aerickson marked this pull request as draft April 24, 2026 19:38
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