Bug 274421 - keyboard with kvm switch fails to function on resume
keyboard with kvm switch fails to function on resume
Product: Fedora
Classification: Fedora
Component: kernel (Show other bugs)
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medium Severity low
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Assigned To: Kernel Maintainer List
Fedora Extras Quality Assurance
Depends On:
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Reported: 2007-09-02 05:26 EDT by Bill C. Riemers
Modified: 2008-06-16 22:18 EDT (History)
3 users (show)

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Doc Type: Bug Fix
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Last Closed: 2008-06-16 22:18:10 EDT
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Description Bill C. Riemers 2007-09-02 05:26:52 EDT
Description of problem:

After a resume from either a suspend to ram or suspend to disk, my keyboard
fails to function.  I find I can repair the problem by climbing under my desk
and unplugging and re-plugging in my keyboard from the computer.

I am not sure if it is important, but I use a kvm switch.

Version-Release number of selected component (if applicable):

How reproducible:


Steps to Reproduce:
1. Suspend my computer to disk or ram.
2. Resume
3. Focus the mouse on any window and attempt to type.
Actual results:

The keyboard fails to function until I disconnect it from the computer and
reconnect this.  I can do this one of two ways.  I can unplug the keyboard from
the kvm switch and then plug it back in.  Or, I can unplug the kvm switch from
the computer and plug it back in.

Expected results:

Keyboard should continue to function normally, as it does for other operating
systems after a suspend and resume.

Additional info:
Comment 1 Till Maas 2007-09-02 10:01:14 EDT
Is it maybe enough to remove and load the kernel module for the usb keyboard? I
do not know which one it is, but if you know, please mention it here, too.
Comment 2 Bill C. Riemers 2007-09-04 09:40:45 EDT
I am not really sure.  My best guess is the keyboard is loaded in the "dock"
module.  So I will create the following file, and see it it works:

# cat >/etc/pm/config.d/defaults <<+
Comment 3 Bill C. Riemers 2007-09-04 10:12:02 EDT
It looks like this solves the problem.  I tried several times after creating the
defaults file, and the keyboard functioned correctly each time.  Since the same
problem also sometimes occurs with a reboot, I also modified /etc/rc.d/rc.local
to do the same thing.

I guess this should be reclassified as a kernel bug, since obviously the problem
is with the kernel module.

Comment 4 Bill C. Riemers 2007-09-04 10:13:37 EDT
BTW.  Where is the documentation for pm-utils located.  I figured out to use the
/etc/pm/config.d/defaults file only by guessing.
Comment 5 Phil Knirsch 2007-09-05 07:29:44 EDT
This might be related to the KVM switch you are using, too. Maybe sometimes it
doesn't forward every signal properly to/from the computer/keyboard.

Have you tried it without the KVM switch and see if it works properly then?

Read ya, Phil
Comment 6 Bill C. Riemers 2007-09-05 09:15:06 EDT
Without the kvm switch it doesn't use a kernel module...  But, I do know the kvm
switch works properly.  I use the same switch with Fedora6, RHEL5, Gentoo,
Ubuntu, Windows, and MacOSX.  Only Fedora 7 exhibits this problem.  And Fedora 7
exhibits the problem on multiple computers.

Reloading the module however, seems to work great for fixing.  Modifying a
couple of configuration files is much less painful than crawling under my desk

Comment 7 Bill C. Riemers 2007-09-28 05:11:29 EDT
For some reason, the reloading of the "dock" module stopped working, and I find
myself regularly climbing under the computer again to unplug and replug my
keyboard.   However, I did discover another workaround.  While the computer is
resuming, I switch to a different computer on my KVM.  Once resumed, I can
switch back and use my keyboard normally.   Because I have a dual monitor setup,
I can monitor the resume progress by watching the second monitor.  Since the
keyboard doesn't actually stop responding until X11 is resumed, I suspect the
problem is with the proprietary NVIDIA driver.  Unfortunately, the regular
driver does not support twinview, so I do not have a good way of taking this
driver out to verify other than possibly a few test boots.

Comment 8 Till Maas 2007-10-03 11:42:15 EDT
I do not know, whether this works or will not crash the system, but maybe it
also helps when you add the nvidia kernel module to SUSPEND_MODULES.
Comment 9 Till Maas 2008-01-08 11:47:37 EST
Hm, maybe the kernel masters can fix the dock module, to make it work better
with suspend and resume.
Comment 10 Bug Zapper 2008-05-14 10:12:17 EDT
This message is a reminder that Fedora 7 is nearing the end of life. Approximately 30 (thirty) days from now Fedora will stop maintaining and issuing updates for Fedora 7. It is Fedora's policy to close all bug reports from releases that are no longer maintained. At that time this bug will be closed as WONTFIX if it remains open with a Fedora 'version' of '7'.

Package Maintainer: If you wish for this bug to remain open because you plan to fix it in a currently maintained version, simply change the 'version' to a later Fedora version prior to Fedora 7's end of life.

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Comment 11 Bug Zapper 2008-06-16 22:18:08 EDT
Fedora 7 changed to end-of-life (EOL) status on June 13, 2008. 
Fedora 7 is no longer maintained, which means that it will not 
receive any further security or bug fix updates. As a result we 
are closing this bug. 

If you can reproduce this bug against a currently maintained version 
of Fedora please feel free to reopen this bug against that version.

Thank you for reporting this bug and we are sorry it could not be fixed.

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