All of lore.kernel.org
 help / color / mirror / Atom feed
From: Alan Stern <stern@rowland.harvard.edu>
To: Peter Chen <hzpeterchen@gmail.com>
Cc: Matthias Schwarzott <zzam@gentoo.org>,
	USB list <linux-usb@vger.kernel.org>,
	usb-storage@lists.one-eyed-alien.net,
	hirofumi@mail.parknet.co.jp
Subject: Re: Amazon Kindle disconnect after Synchronize Cache
Date: Sat, 6 Mar 2021 11:07:26 -0500	[thread overview]
Message-ID: <20210306160726.GB74411@rowland.harvard.edu> (raw)
In-Reply-To: <CAL411-qf+c_CB4cL=2349QqCCYimOBCYxXbsOfLbvVYOg0294g@mail.gmail.com>

On Sat, Mar 06, 2021 at 10:19:54AM +0800, Peter Chen wrote:
> On Sat, Mar 6, 2021 at 3:17 AM Alan Stern <stern@rowland.harvard.edu> wrote:

> > Is runtime power management enabled?  Maybe the Kindle disconnects
> > whenever the computer tries to suspend it.  This typically happens 2
> > seconds after the last command was issued, which matches your
> > observations.  If runtime PM is enabled, you can try disabling it.
> >
> >
> Alan, I think you may be right. It might want to support the feature like
> kindle goes to suspend after the Windows PC
> enters suspend (but VBUS is there), the Windows PC may never suspend the
> bus if a mass storage device is connected.

That's possible.  I have never tried to measure the bus activity when a 
Windows host is suspended.

Alan Stern

  parent reply	other threads:[~2021-03-06 16:11 UTC|newest]

Thread overview: 33+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-03-05 16:54 Amazon Kindle disconnect after Synchronize Cache Matthias Schwarzott
2021-03-05 19:14 ` Alan Stern
     [not found]   ` <CAL411-qf+c_CB4cL=2349QqCCYimOBCYxXbsOfLbvVYOg0294g@mail.gmail.com>
2021-03-06 16:07     ` Alan Stern [this message]
2021-03-07  5:58   ` Matthias Schwarzott
2021-03-07 15:52     ` Alan Stern
2021-03-07 16:52       ` Matthias Schwarzott
2021-03-07 16:58         ` Alan Stern
2021-03-08 21:59           ` Matthias Schwarzott
2021-03-09 15:50             ` [usb-storage] " Alan Stern
2021-03-10 20:56               ` Matthias Schwarzott
2021-03-10 21:46                 ` Alan Stern
2021-03-11  6:05                   ` Matthias Schwarzott
2021-03-11 14:39                     ` Alan Stern
2021-03-16  5:26                       ` Matthias Schwarzott
2021-03-16 16:26                         ` Alan Stern
2021-03-16 16:43                           ` [systemd-devel] " Hans de Goede
2021-03-16 17:04                             ` Alan Stern
2021-03-16 21:52                               ` Matthias Schwarzott
2021-03-17 12:21                               ` Hans de Goede
2021-03-17 15:17                                 ` Alan Stern
2021-03-17 16:47                                   ` Lennart Poettering
     [not found]                                     ` <F279F9BC020000F5AE14D9EC@gwsmtp.uni-regensburg.de>
     [not found]                                       ` <C63C44570200006665972EEF@gwsmtp.uni-regensburg.de>
     [not found]                                         ` <B960C12A020000A667ECE9F9@gwsmtp.uni-regensburg.de>
     [not found]                                           ` <B72C58530200001565972EEF@gwsmtp.uni-regensburg.de>
     [not found]                                             ` <0F2319EB020000F567ECE9F9@gwsmtp.uni-regensburg.de>
     [not found]                                               ` <DE3F57520200009E65972EEF@gwsmtp.uni-regensburg.de>
     [not found]                                                 ` <52CC0074020000A3D68BC3D5@gwsmtp.uni-regensburg.de>
2021-03-18  7:03                                                   ` Antw: [EXT] " Ulrich Windl
2021-03-18 14:59                                                     ` Alan Stern
     [not found]                                                 ` <474C42CD02000091AE14D9EC@gwsmtp.uni-regensburg.de>
2021-03-18  7:04                                                   ` Ulrich Windl
     [not found]                                                   ` <D43A6F56020000F865972EEF@gwsmtp.uni-regensburg.de>
2021-03-18  7:10                                                     ` Antw: [EXT] [systemd-devel] [PATCH] usb-storage: Add quirk to defeat Kindle's automatic unload Ulrich Windl
2021-03-18 15:03                                                       ` Alan Stern
2021-03-17 17:56                                   ` [systemd-devel] [usb-storage] Re: Amazon Kindle disconnect after Synchronize Cache Matthias Schwarzott
2021-03-17 18:31                                     ` Hans de Goede
2021-03-17 19:06                                     ` [PATCH] usb-storage: Add quirk to defeat Kindle's automatic unload Alan Stern
2021-03-18 11:39                                       ` Hans de Goede
2021-03-18 13:50                                       ` [systemd-devel] " Tomasz Torcz
2021-03-18 15:07                                         ` Alan Stern
2021-03-16 21:43                           ` [usb-storage] Re: Amazon Kindle disconnect after Synchronize Cache Matthias Schwarzott

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20210306160726.GB74411@rowland.harvard.edu \
    --to=stern@rowland.harvard.edu \
    --cc=hirofumi@mail.parknet.co.jp \
    --cc=hzpeterchen@gmail.com \
    --cc=linux-usb@vger.kernel.org \
    --cc=usb-storage@lists.one-eyed-alien.net \
    --cc=zzam@gentoo.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.