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Bug 703474 - xen-kbdfront - advertise either absolute or relative coordinates
Summary: xen-kbdfront - advertise either absolute or relative coordinates
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 6
Classification: Red Hat
Component: kernel
Version: 6.2
Hardware: Unspecified
OS: Linux
unspecified
low
Target Milestone: rc
: ---
Assignee: Igor Mammedov
QA Contact: Virtualization Bugs
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2011-05-10 13:26 UTC by Igor Mammedov
Modified: 2011-12-06 13:30 UTC (History)
8 users (show)

Fixed In Version: kernel-2.6.32-153.el6
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2011-12-06 13:30:25 UTC
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)
Input: xen-kbdfront - advertise either absolute or relative coordinates (3.99 KB, patch)
2011-05-10 16:03 UTC, Igor Mammedov 		no flags Details | Diff
View All


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2011:1530 0 normal SHIPPED_LIVE Moderate: Red Hat Enterprise Linux 6 kernel security, bug fix and enhancement update 2011-12-06 01:45:35 UTC

Description Igor Mammedov 2011-05-10 13:26:58 UTC 
Resync pvops with upstream. Back-port upstream commit 8c3c283:
 Input: xen-kbdfront - advertise either absolute or relative coordinates

    A virtualized display device is usually viewed with the vncviewer
    application, either by 'xm vnc domU' or with vncviewer localhost:port.
    vncviewer and the RFB protocol provides absolute coordinates to the
    virtual display. These coordinates are either passed through to a PV
    guest or converted to relative coordinates for a HVM guest.
    
    A PV guest receives these coordinates and passes them to the kernels
    evdev driver. There it can be picked up by applications such as the
    xorg-input drivers. Using absolute coordinates avoids issues such as
    guest mouse pointer not tracking host mouse pointer due to wrong mouse
    acceleration settings in the guests X display.
    
    Advertise either absolute or relative coordinates to the input system
    and the evdev driver, depending on what dom0 provides. The xorg-input
    driver prefers relative coordinates even if a devices provides both.

and revert commit c36b58e8 to fix regression introduced by 8c3c283:
 Input: xen-kbdfront - fix mouse getting stuck after save/restore

 If driver has been configured for ABS coordinates at start it will get
    XENKBD_TYPE_POS events and then suddenly after restore it'll start getting
    XENKBD_TYPE_MOTION events, that will be dropped later and they won't get
    into user-space.
 Driver on restore should ask xen for request-abs-pointer again if it is
    available. So restore parts that did it before 8c3c283.

Version-Release number of selected component (if applicable):
all rel6  kernels
Comment 2 Igor Mammedov 2011-05-10 16:03:44 UTC 
Created attachment 498088 [details]
Input: xen-kbdfront - advertise either absolute or relative coordinates
Comment 3 RHEL Program Management 2011-05-13 15:23:26 UTC 
This request was evaluated by Red Hat Product Management for inclusion
in a Red Hat Enterprise Linux maintenance release. Product Management has 
requested further review of this request by Red Hat Engineering, for potential
inclusion in a Red Hat Enterprise Linux Update release for currently deployed 
products. This request is not yet committed for inclusion in an Update release.
Comment 4 Aristeu Rozanski 2011-05-25 18:57:04 UTC 
Patch(es) available on kernel-2.6.32-153.el6
Comment 7 Qin Guan 2011-07-27 08:34:37 UTC 
QE want to know the steps to reproduce/verify this bug, as no definite steps mentioned in the bug description. Also did a testing with 6.1 kernel (2.6.32-131.0.1.el6) x86_64 PV guest on 5.7 x86_64 host, no any mouse/keyboard problem found after save/restore.
Comment 8 Igor Mammedov 2011-07-27 11:40:27 UTC 
(In reply to comment #7)
> QE want to know the steps to reproduce/verify this bug, as no definite steps
> mentioned in the bug description. Also did a testing with 6.1 kernel
> (2.6.32-131.0.1.el6) x86_64 PV guest on 5.7 x86_64 host, no any mouse/keyboard
> problem found after save/restore.

You won't find a problem in 6.1 because it was introduced upstream/fc15 by the patch:
  Input: xen-kbdfront - advertise either absolute or relative coordinates
which 6.1 doesn't have. And this BZ is pulling in this patch and a fix for save/restore bug  it introduces.

I suppose checking that nothing is broken with this path should be enough, unless you'll be able to find screwed up evdev/X config  configuration which actually use relative coordinates.
Comment 10 errata-xmlrpc 2011-12-06 13:30:25 UTC 
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

http://rhn.redhat.com/errata/RHSA-2011-1530.html
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