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------------------------------------------------------------------------
On 2013-04-25T02:16:18+00:00 Grumpyrogue wrote:

I'm using a two-monitor setup with an  ATI Mobility Radeon HD 4200 graphics 
card on my Compaq Presario CQ61.
The Laptop screen has a hardware resolution of 1366x768, the external monitor a 
hardware resolution of 1280x1024.

If I set up the second monitor using

xrandr --output VGA-0 --mode 1280x1024 --pos 1368x0 --rotate normal --output 
LVDS --mode 1366x768 --pos 0x0 --rotate normal
(or the gnome gui, the effects are equal)

I expect:
1) the left 1366x768 area to be on the laptop screen, and
2) the right 1280x1024 area to be on the big monitor.

But I observe:
1) happens as expected
2) happens almost. Instead, the 2 rightmost pixels on the laptop monitor are 
repeated on the left border of the big monitor and the two rightmost columns of 
the right monitor are not visible on any monitor at all.

If I switch the laptop monitor resolution to 1280x720 (or any more
"common" resolution), this effect does not occur and everything works as
expected.

Build Date & Platform:
X.Org X Server 1.12.4
Release Date: 2012-08-27
[    52.070] X Protocol Version 11, Revision 0
[    52.070] Build Operating System: Linux 2.6.32-5-686-bigmem i686 Debian
[    52.070] Current Operating System: Linux eva 3.2.0-4-486 #1 Debian 3.2.32-1 
i686
[    52.070] Kernel command line: BOOT_IMAGE=/boot/vmlinuz-3.2.0-4-486 
root=UUID=001323c2-d51c-4188-8cf7-153dc486a5c8 ro quiet
[    52.070] Build Date: 05 November 2012  10:28:15AM
[    52.070] xorg-server 2:1.12.4-3 (Julien Cristau <[email protected]>) 

OS: Linux Mint Debian Update Pack 6

Other: This bug was also reported on a Ubuntu tracker (I copied it and edited 
to suit my circumstances), but it has been reported on multiple OS's and it 
would appear to be an upstream Xorg bug:
https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-ati/+bug/680614

There is a workaround in the form of "xrandr --output VGA-0 --auto --pos
1368x0" (shift the second display 2 pixels to the right).

Reply at: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-
ati/+bug/680614/comments/29

------------------------------------------------------------------------
On 2013-04-25T09:13:15+00:00 Michel-daenzer wrote:

> xrandr --output VGA-0 --mode 1280x1024 --pos 1368x0 --rotate normal --output
> LVDS --mode 1366x768 --pos 0x0 --rotate normal
[...]
> There is a workaround in the form of "xrandr --output VGA-0 --auto --pos
> 1368x0" (shift the second display 2 pixels to the right).

I assume the first '--pos 1368x0' is a typo and should be '--pos
1366x0'.

I'm afraid this is not easily fixable, as the hardware only supports
horizontal offsets which are a multiple of 4, so the drivers just round
down values that aren't.

Reply at: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-
ati/+bug/680614/comments/30

------------------------------------------------------------------------
On 2013-04-25T13:11:34+00:00 agd5f wrote:

As Michel noted, this is a hardware limitation.  To fix this properly,
the xserver would need to be changed to allocate separate buffers for
each display rather than one big surface for all displays.
Unfortunately, this is a fairly major task.

Reply at: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-
ati/+bug/680614/comments/31

------------------------------------------------------------------------
On 2013-04-26T04:03:49+00:00 Bob Hill wrote:

Thank you Alex T. for opening this bug, and Michel and Alex D. for your
feedbacks.

Does the hardware limitation (horizontal offsets multiple of 4) apply to all 
three
of the popular desktop graphics hardware Intel, ATI/AMD/Radeon and Nvidia, or 
only
to a subset of these? (Please excuse my ignorance if this is a stupid question 
:-)

Reply at: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-
ati/+bug/680614/comments/33

------------------------------------------------------------------------
On 2013-04-26T13:04:39+00:00 agd5f wrote:

(In reply to comment #3)
> Thank you Alex T. for opening this bug, and Michel and Alex D. for your
> feedbacks.
> 
> Does the hardware limitation (horizontal offsets multiple of 4) apply to all
> three
> of the popular desktop graphics hardware Intel, ATI/AMD/Radeon and Nvidia,
> or only
> to a subset of these? (Please excuse my ignorance if this is a stupid
> question :-)

Vertical alignments have to a multiple of 2 as well.  It applies to most
Radeon asics.  Not sure about other vendors, but it's likely they may
have similar requirements.

Reply at: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-
ati/+bug/680614/comments/34

------------------------------------------------------------------------
On 2013-10-14T18:57:03+00:00 Anonymous-dodgeit wrote:

So does the proprietary fglrx driver include a hack/workaround for this?
Because with fglrx the position of the second screen is correct!

Reply at: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-
ati/+bug/680614/comments/35

------------------------------------------------------------------------
On 2013-12-11T11:33:56+00:00 Anonymous-dodgeit wrote:

For me the problem exists only when the configuration sets the 1920x1080
monitor is on the rightside of the 1366x786 one, but not vice versa.

Reply at: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-
ati/+bug/680614/comments/36

------------------------------------------------------------------------
On 2013-12-11T13:20:08+00:00 agd5f wrote:

(In reply to comment #6)
> For me the problem exists only when the configuration sets the 1920x1080
> monitor is on the rightside of the 1366x786 one, but not vice versa.

See comment 1.  1366 is not a mutliple of 4 while 1920 is.  IIRC, vesa
mandates the the hdisplay value be a multiple of 8, so 1366 is
technically not vesa compliant.

Reply at: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-
ati/+bug/680614/comments/37

------------------------------------------------------------------------
On 2013-12-11T23:52:31+00:00 Anonymous-dodgeit wrote:

Yeah, but why is this only when the 1920 monitor is right of 1366 and
not when 1920 ist left of the 1366 one? And why does the fglrx driver
work fine?

Reply at: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-
ati/+bug/680614/comments/38

------------------------------------------------------------------------
On 2013-12-12T02:15:51+00:00 agd5f wrote:

Created attachment 90633
possible fix

Does this patch fix the issue?

Reply at: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-
ati/+bug/680614/comments/39

------------------------------------------------------------------------
On 2013-12-12T13:10:55+00:00 Anonymous-dodgeit wrote:

Created attachment 90665
applied patch failed

No, it doesn't. It messed it all up, as you can see in the attached picture.
The patch was applied on 3.13rc3 on a Ubuntu saucy 64bit. The configuration 
included a common bottomline of each display. The 1366 monitor was the left one 
(notebook).
A configuration with only one display worked, so the patch didn't effect that.

Reply at: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-
ati/+bug/680614/comments/40

------------------------------------------------------------------------
On 2013-12-14T17:42:00+00:00 Freedesktop-treblig wrote:

AH:
  As per your comment #8 about it only being a problem when the 1920 is on the 
right of the 1366 monitor - this makes sense....

  What happens is that something doesn't expect offsets that aren't
multiples of 8.

When you have the   1920-1366  you end up with the 1920 starting at X=0,
and the 1366 starting at X=1920 (which is divisible by 8) - so
everything is happy.

When you have the 1366-1920 setup you end up with the 1366 starting at
X=0, and the 1920 starting at X=1366 and having a display not aligned to
/8 value gets the thing confused.

Reply at: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-
ati/+bug/680614/comments/41

------------------------------------------------------------------------
On 2014-01-13T14:13:29+00:00 agd5f wrote:


*** This bug has been marked as a duplicate of bug 58652 ***

Reply at: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-
ati/+bug/680614/comments/44


** Changed in: xserver-xorg-driver-ati
       Status: Unknown => Invalid

** Changed in: xserver-xorg-driver-ati
   Importance: Unknown => Medium

-- 
You received this bug notification because you are a member of Desktop
Packages, which is subscribed to xserver-xorg-video-ati in Ubuntu.
https://bugs.launchpad.net/bugs/680614

Title:
  Position of second monitor wrong in dual monitor setup if first
  monitor is 1366x768

Status in X.org XServer - ATI gfx chipset driver:
  Invalid
Status in “xserver-xorg-video-ati” package in Ubuntu:
  Incomplete

Bug description:
  Binary package hint: xorg

  I'm using a two-monitor setup with an ati graphics card (Mobility Radeon HD 
4300) on my laptop(lenovo u450p).
  The Laptop screen has a hardware resolution of 1366x768, the external monitor 
a hardware resolution of 1920x1080. 

  If I set up the second monitor using

  xrandr --output HDMI-0 --off
  xrandr --output LVDS --auto
  xrandr --output HDMI-0 --auto --right-of LVDS

  (or the kde gui, the effects are equal)
  I expect

  1) the left 1366x768 area to be on the laptop screen, and 
  2) the right 1920x768 area to be on the big monitor. 

  But I observe:
  1) happens as expected
  2) happens almost. instead, the 2 rightmost pixels on the laptop monitor are 
repeated on the left border of the big monitor(filled with black to the 
bottom), in turn the two rightmost columns of the virtual display area are not 
visible on any monitor at all.

  If I switch the laptop monitor resolution to 1280x720, this effect does not 
occur, and - except for the then blurred laptop screen - everything works as 
expected.
  A screenshot shows the whole virtual desktop correctly.

  Ubuntu version: 10.10 (maverick)
  graphics card:
  01:00.0 VGA compatible controller: ATI Technologies Inc M92 LP [Mobility 
Radeon HD 4300 Series]
  xorg version: 1:7.5+6ubuntu3
  I'm using the 'radeon' display driver, as detected by default. fglrx is not 
installed.
  using kde 4.5.3

  ProblemType: Bug
  DistroRelease: Ubuntu 10.10
  Package: xorg 1:7.5+6ubuntu3
  ProcVersionSignature: Ubuntu 2.6.35-22.35-generic 2.6.35.4
  Uname: Linux 2.6.35-22-generic x86_64
  Architecture: amd64
  DRM.card0.HDMI_Type_A.1:
   status: connected
   enabled: enabled
   dpms: On
   modes: 1920x1080 1920x1080 1600x1200 1680x1050 1400x1050 1280x1024 1280x1024 
1440x900 1280x960 1152x864 1280x720 1024x768 1024x768 1024x768 832x624 800x600 
800x600 800x600 800x600 720x480 640x480 640x480 640x480 640x480 720x400
   edid-base64: 
AP///////wAEafokAQEBARAUAQOANB14Lu7VpVVImyYSUFS/74DRwLMAqUCVAJBAgYCBQHFPAjqAGHE4LUBYLEUACSUhAAAeAAAA/wBBNExNSVowNzIyMDcKAAAA/QAySx5TEwAKICAgICAgAAAA/ABBU1VTIFZIMjQyCiAgAW0CAyXxUpAFBAMCBwYPDh8UHh0TEhEWASMJfweDAQAAZQMMABAAAjqAGHE4LUBYLEUACSUhAAAeAR2AGHEcFiBYLCUACSUhAACeAR0AclHQHiBuKFUACSUhAAAeAjqA0HI4LUAQLEWACSUhAAAejArQiiDgLRAQPpYACSUhAAAYVw==
  DRM.card0.LVDS.1:
   status: connected
   enabled: enabled
   dpms: On
   modes: 1366x768 1366x768 1280x720 1152x768 1024x768 800x600 848x480 720x480 
640x480
   edid-base64: 
AP///////wAGrzwiAAAAAAATAQOAHxF4Cpf1m1lUjCUiUFQAAAABAQEBAQEBAQEBAQEBAQEBEhtWRlAAIzAmFjYANa0QAAAYDBJWRlAAIzAmFjYANa0QAAAYAAAA/gBBVU8KICAgICAgICAgAAAA/gBCMTQwWFcwMiBWMiAKAMk=
  DRM.card0.VGA.1:
   status: disconnected
   enabled: disabled
   dpms: Off
   modes: 
   edid-base64:
  Date: Tue Nov 23 20:11:52 2010
  InstallationMedia: Kubuntu 10.10 "Maverick Meerkat" - Release Candidate amd64 
(20100928.3)
  MachineType: LENOVO 3389
  ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.35-22-generic 
root=UUID=7965020f-a640-4958-8bea-09eb9aaa31a3 ro
  ProcEnviron:
   LANGUAGE=
   PATH=(custom, user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: xorg
  dmi.bios.date: 01/20/2010
  dmi.bios.vendor: LENOVO
  dmi.bios.version: 22CN35WW(V2.02)
  dmi.board.name: NITU1
  dmi.board.vendor: LENOVO
  dmi.board.version: REFERENCE
  dmi.chassis.asset.tag: No Asset Tag
  dmi.chassis.type: 10
  dmi.chassis.vendor: No Enclosure
  dmi.chassis.version: N/A
  dmi.modalias: 
dmi:bvnLENOVO:bvr22CN35WW(V2.02):bd01/20/2010:svnLENOVO:pn3389:pvrLenovoIdeaPadU450p:rvnLENOVO:rnNITU1:rvrREFERENCE:cvnNoEnclosure:ct10:cvrN/A:
  dmi.product.name: 3389
  dmi.product.version: Lenovo IdeaPad U450p
  dmi.sys.vendor: LENOVO
  peripherals:
   
  system:
   distro:             Ubuntu
   codename:           maverick
   architecture:       x86_64
   kernel:             2.6.35-22-generic
  --- 
  Architecture: amd64
  CompizPlugins: No value set for 
`/apps/compiz-1/general/screen0/options/active_plugins'
  CompositorRunning: kwin
  DRM.card0.HDMI.A.1:
   status: connected
   enabled: enabled
   dpms: On
   modes: 1920x1080 1600x1200 1680x1050 1400x1050 1280x1024 1280x1024 1440x900 
1280x960 1152x864 1024x768 1024x768 1024x768 832x624 800x600 800x600 800x600 
800x600 640x480 640x480 640x480 640x480 720x400
   edid-base64: 
AP///////wAEafokAQEBARAUAQOANB14Lu7VpVVImyYSUFS/74DRwLMAqUCVAJBAgYCBQHFPAjqAGHE4LUBYLEUACSUhAAAeAAAA/wBBNExNSVowNzIyMDcKAAAA/QAySx5TEwAKICAgICAgAAAA/ABBU1VTIFZIMjQyCiAgAW0CAyXxUpAFBAMCBwYPDh8UHh0TEhEWASMJfweDAQAAZQMMABAAAjqAGHE4LUBYLEUACSUhAAAeAR2AGHEcFiBYLCUACSUhAACeAR0AclHQHiBuKFUACSUhAAAeAjqA0HI4LUAQLEWACSUhAAAejArQiiDgLRAQPpYACSUhAAAYVw==
  DRM.card0.LVDS.1:
   status: connected
   enabled: enabled
   dpms: On
   modes: 1366x768 1366x768 1280x720 1152x768 1024x768 800x600 848x480 720x480 
640x480
   edid-base64: 
AP///////wAGrzwiAAAAAAATAQOAHxF4Cpf1m1lUjCUiUFQAAAABAQEBAQEBAQEBAQEBAQEBEhtWRlAAIzAmFjYANa0QAAAYDBJWRlAAIzAmFjYANa0QAAAYAAAA/gBBVU8KICAgICAgICAgAAAA/gBCMTQwWFcwMiBWMiAKAMk=
  DRM.card0.VGA.1:
   status: disconnected
   enabled: disabled
   dpms: Off
   modes: 
   edid-base64:
  DistUpgraded: Fresh install
  DistroCodename: natty
  DistroRelease: Ubuntu 11.04
  DistroVariant: kubuntu
  DkmsStatus: bcmwl, 5.100.82.38+bdcom, 2.6.38-8-generic, x86_64: installed
  GraphicsCard:
   ATI Technologies Inc M92 LP [Mobility Radeon HD 4300 Series] [1002:9552] 
(prog-if 00 [VGA controller])
     Subsystem: Lenovo Device [17aa:3903]
  InstallationMedia: Kubuntu 11.04 "Natty Narwhal" - Alpha amd64 (20110301.4)
  MachineType: LENOVO 3389
  NonfreeKernelModules: wl
  Package: xserver-xorg-video-ati 1:6.14.0-0ubuntu4
  PackageArchitecture: amd64
  ProcEnviron:
   LANGUAGE=en_DK
   PATH=(custom, user)
   LANG=en_DK.UTF-8
   LC_MESSAGES=en_DK.UTF-8
   SHELL=/bin/bash
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.38-8-generic 
root=UUID=ab9c6c70-e9b1-4cad-bc9a-efc17e8e8a7d ro
  ProcVersionSignature: Ubuntu 2.6.38-8.42-generic 2.6.38.2
  Renderer: Unknown
  Tags:  natty kubuntu patch
  Uname: Linux 2.6.38-8-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare
  dmi.bios.date: 01/20/2010
  dmi.bios.vendor: LENOVO
  dmi.bios.version: 22CN35WW(V2.02)
  dmi.board.name: NITU1
  dmi.board.vendor: LENOVO
  dmi.board.version: REFERENCE
  dmi.chassis.asset.tag: No Asset Tag
  dmi.chassis.type: 10
  dmi.chassis.vendor: No Enclosure
  dmi.chassis.version: N/A
  dmi.modalias: 
dmi:bvnLENOVO:bvr22CN35WW(V2.02):bd01/20/2010:svnLENOVO:pn3389:pvrLenovoIdeaPadU450p:rvnLENOVO:rnNITU1:rvrREFERENCE:cvnNoEnclosure:ct10:cvrN/A:
  dmi.product.name: 3389
  dmi.product.version: Lenovo IdeaPad U450p
  dmi.sys.vendor: LENOVO
  version.compiz: compiz N/A
  version.ia32-libs: ia32-libs 20090808ubuntu13
  version.libdrm2: libdrm2 2.4.23-1ubuntu6
  version.libgl1-mesa-dri: libgl1-mesa-dri 7.10.2-0ubuntu2
  version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
  version.libgl1-mesa-glx: libgl1-mesa-glx 7.10.2-0ubuntu2
  version.xserver-xorg: xserver-xorg 1:7.6+4ubuntu3
  version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.14.0-0ubuntu4
  version.xserver-xorg-video-intel: xserver-xorg-video-intel N/A
  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau N/A

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