Messages in this thread | | | From | John Ogness <> | Subject | Re: PNP0501 serial driver takes almost 2 seconds to suspend/resume (printk issue) | Date | Fri, 08 Jul 2022 10:07:08 +0206 |
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Hi Todd,
Thanks for reporting this.
On 2022-07-07, Todd Brandt <todd.e.brandt@linux.intel.com> wrote: > Ever since 5.19.0-rc1 the serial device has taken almost a second > longer in both suspend and resume. This effect is witnessed in half > the machines in our lab (~10 machines). It occurs on dell, asus, > gigabyte and other machines so it's not hardware specific.
Please provide a full dmesg log if you can. The important parts of the log would be:
- boot arguments - any lines with "printk" in it - timing information - messages during suspend and resume
pr_flush() uses a timeout of 1 second. I assume your console driver is not printing and therefore not making any forward progress.
John Ogness
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