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Tue, 07 Jul 2026 02:54:00 -0700 (PDT) Message-ID: <620721eb-2b0e-4279-81e2-420996195206@gmail.com> Date: Tue, 7 Jul 2026 18:53:58 +0900 Precedence: bulk X-Mailing-List: linux-usb@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [Bug 221721] New: prom21-xhci does not allow to use USB keyboard in plymouth To: Thorsten Leemhuis Cc: bugzilla-daemon@kernel.org, Linux kernel regressions list , linux-usb@vger.kernel.org, marx.tomasz@gmail.com References: <328d3158-8086-4de7-a96e-7c2a514e3018@leemhuis.info> Content-Language: en-US From: Jihong Min In-Reply-To: <328d3158-8086-4de7-a96e-7c2a514e3018@leemhuis.info> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit With a little more of thinking, I think this happens due to the initramfs building tool not including xhci-pci-prom21.ko when xhci-pci.ko is built with the Kconfig where USB_XHCI_PCI_PROM21 was enabled. Can you check your initramfs file for whether it holds xhci-pci-prom21.ko correctly, or not? For example, with dracut, you can do something like: cat <<'EOF' | sudo tee /etc/dracut.conf.d/10-xhci-pci-prom21.conf # PROM21 xHCI PCI glue is needed before root/LUKS unlock when xhci-pci is modular. force_drivers+=" xhci-pci-prom21 " EOF Sincerely, Jihong Min On 7/7/26 17:03, Thorsten Leemhuis wrote: > [Switching to email, hope this will work] > > Jihong Min, it seems a recent change of yours is causing trouble. See > below for details. > > Side note, but not my area of expertise, so feel free to ignore this, as > I might be sending people in the wrong direction and it's just a hunch > anyway: wonder if this is another of those situations where the driver > needs to be in the initramfs. Tomasz, did you have SENSORS_PROM21_XHCI=m > when things were broken? And if yes: have you tried if adding it to the > initramfs or setting SENSORS_PROM21_XHCI=y helps? > > Ciao, Thorsten > > On 7/4/26 17:41, bugzilla-daemon@kernel.org wrote: >> https://bugzilla.kernel.org/show_bug.cgi?id=221721 >> >> Bug ID: 221721 >> Summary: prom21-xhci does not allow to use USB keyboard in >> plymouth >> Product: Drivers >> Version: 2.5 >> Hardware: AMD >> OS: Linux >> Status: NEW >> Severity: low >> Priority: P3 >> Component: USB >> Assignee: drivers_usb@kernel-bugs.kernel.org >> Reporter: marx.tomasz@gmail.com >> Regression: No >> >> Created attachment 310416 >> --> https://bugzilla.kernel.org/attachment.cgi?id=310416&action=edit >> output of "sudo lsusb -v" >> >> Hi, >> >> After update to 7.2-rc1 I was unable to type in LUKS password in plymouth. I >> tried both of my USB keyboards, but both of them just briefly lit up the LEDs >> and then seemed to turn off. Bisection pointed to >> >> commit 364f4a55c661641c02c86a849f0608d8fc3c0006 >> Merge: e4b4bfaa5090 1c2b66a7d725 >> Author: Linus Torvalds >> Date: Mon Jun 22 12:09:47 2026 -0700 >> >> Merge tag 'usb-7.2-rc1' of >> git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb >> >> and then >> >> commit 9e896b4a48c4e815956d28961448041c80ad5a19 (HEAD) >> Author: Jihong Min >> Date: Tue May 19 09:07:31 2026 +0900 >> >> usb: xhci-pci: add AMD Promontory 21 PCI glue >> >> After setting SENSORS_PROM21_XHCI=n and compiling kernel again, I'm able to use >> my PC normally. >> >> CPU: AMD Ryzen 9 9900X >> Motherboard: X870I AORUS PRO ICE >> Output of "lsusb -v" provided in attachment. >> >