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usb hotplug broken on v6.5.12

DISCUSSION Sebastian Ott 2 participants 3 messages Nov 28, 2023 Stable branch

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Hej,

usb hotplug doesn't work for me running stable kernel v6.5.12 on an AMD based Thinkpad t495s. Bisect pointed to 7b8ae3c24ef ("xhci: Loosen RPM as default policy to cover for AMD xHC 1.1") - which is 4baf1218150 upstream.

Reverting that from 6.5.12 fixes the issue for me.
Current upstream rc kernel contains this patch but doesn't show the issue.

Regards,
Sebastian

#1 lore raw
Quoted 6 lines · Sebastian Ott

Hej,

usb hotplug doesn't work for me running stable kernel v6.5.12 on an AMD based Thinkpad t495s. Bisect pointed to 7b8ae3c24ef ("xhci: Loosen RPM as default policy to cover for AMD xHC 1.1") - which is 4baf1218150 upstream.

Quoted 6 lines

Reverting that from 6.5.12 fixes the issue for me.
Current upstream rc kernel contains this patch but doesn't show the issue.

Regards,
Sebastian

I believe it's the same discussion as https://lore.kernel.org/stable/[email protected]/#t

The outcome was that another missing patch is in the stable queue for various kernels and will be part of the next stable release for various kernels.

#2 lore raw
Quoted 11 lines · Mario Limonciello
Quoted 7 lines · Sebastian Ott

usb hotplug doesn't work for me running stable kernel v6.5.12 on an AMD based Thinkpad t495s. Bisect pointed to 7b8ae3c24ef ("xhci: Loosen RPM as default policy to cover for AMD xHC 1.1") - which is 4baf1218150 upstream.

Reverting that from 6.5.12 fixes the issue for me.
Current upstream rc kernel contains this patch but doesn't show the issue.

I believe it's the same discussion as https://lore.kernel.org/stable/[email protected]/#t

The outcome was that another missing patch is in the stable queue for various kernels and will be part of the next stable release for various kernels.

Great, thank you!
I can confirm that v6.5.12 + a5d6264b ("xhci: Enable RPM on controllers that support low-power states") fixes the issue for me.

Sebastian