From: Mark Lord <lkml@rtr.ca>
To: Linux Kernel <linux-kernel@vger.kernel.org>
Subject: 2.6.14-RC2 Bug? HiSpeed USB devices demoted to low-speed after resume
Date: Tue, 18 Oct 2005 11:36:42 -0400 [thread overview]
Message-ID: <4355168A.8010507@rtr.ca> (raw)
For both suspend-to-disk ("software suspend") and suspend-to-ram,
the 2.6.14-RC2 kernel appears to disable ehci_hcd on resume.
That is, plugging in a hi-speed Mass Storage device *after* resume
results in these syslog messages:
>kernel: usb 3-1: new full speed USB device using uhci_hcd and address 2
>kernel: usb 3-1: not running at top speed; connect to a high speed hub
Very odd. The 2.6.13 kernel behaves much better, as does 2.6.14-RC2
*before* suspending:
>kernel: usb 5-5: new high speed USB device using ehci_hcd and address 3
Unloading and reloading ehci_hcd restores high-speed USB operation,
until the next suspend/resume.
WTF?
reply other threads:[~2005-10-18 15:36 UTC|newest]
Thread overview: [no followups] expand[flat|nested] mbox.gz Atom feed
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=4355168A.8010507@rtr.ca \
--to=lkml@rtr.ca \
--cc=linux-kernel@vger.kernel.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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox