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* [Bug 220486] New: External monitor switches to lower refresh rate after resume from suspend
@ 2025-08-23 18:55 bugzilla-daemon
  0 siblings, 0 replies; only message in thread
From: bugzilla-daemon @ 2025-08-23 18:55 UTC (permalink / raw)
  To: linux-usb

https://bugzilla.kernel.org/show_bug.cgi?id=220486

            Bug ID: 220486
           Summary: External monitor switches to lower refresh rate after
                    resume from suspend
           Product: Drivers
           Version: 2.5
          Hardware: Intel
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P3
         Component: USB
          Assignee: drivers_usb@kernel-bugs.kernel.org
          Reporter: bghome@gmail.com
        Regression: No

Created attachment 308541
  --> https://bugzilla.kernel.org/attachment.cgi?id=308541&action=edit
Kernel warning from drivers/usb/typec/class.c

An external monitor is connected to my laptop via USB-C port. Normally it works
in 3840x2160@30Hz mode. Sometimes after resuming from suspend, it falls back to
2048x1080@24Hz mode which is the highest available setting. This can be fixed
by re-plugging the USB-C cable or reboot.

At the same time I see a kernel warning raised by the USB driver (see attached
log).

Kernel version: LTS 6.12.41

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