Nouveau - May 2008 - [Bug 15949] New: LVDS-0 has wrapped screen with Randr1.2

http://bugs.freedesktop.org/show_bug.cgi?id=15949

           Summary: LVDS-0 has wrapped screen with Randr1.2
           Product: xorg
           Version: git
          Platform: x86 (IA32)
        OS/Version: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/nouveau
        AssignedTo: nouveau at lists.freedesktop.org
        ReportedBy: simplyw00x at gmail.com
         QAContact: xorg-team at lists.x.org


Created an attachment (id=16562)
 --> (http://bugs.freedesktop.org/attachment.cgi?id=16562)
Xorg log with external monitor plugged in

Problem:
Left-most 10px of my laptop's screen are offset right 10px, right-most 10px
are
displayed on the left of that screen. VGA-0 has no problems.

Steps to re-produce:
xrandr --output VGA-0 --mode 640x480 # to eleminate my previous Virtual line as
a source of the problem
xrandr --output VGA-0 --left-of LVDS-0
xrandr --output LVDS-0 --mode 1280x800

Expected result:
The laptop and the external monitor form one large desktop, with all pixels in
their correct spots!

Actual result:
See attached images

Work-around:
This problem persists even if the external monitor is removed and the computer
re-booted. The only way to restore the correct display of LVDS-0 is to disable
Randr1.2 in xorg.conf and re-boot (zapping X doesn't help in this case).

-------------------------------------------------------------------------
[root at castlereagh ~]# lspci -vv -d10de:0244
00:05.0 VGA compatible controller: nVidia Corporation C51 [Geforce 6150 Go]
(rev a2) (prog-if 00 [VGA controller])
        Subsystem: Hewlett-Packard Company Unknown device 30bf
        Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR- FastB2B- DisINTx-
        Status: Cap+ 66MHz+ UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort-
<TAbort-
<MAbort- >SERR- <PERR- INTx-
        Latency: 0
        Interrupt: pin A routed to IRQ 17
        Region 0: Memory at b2000000 (32-bit, non-prefetchable) [size=16M]
        Region 1: Memory at c0000000 (64-bit, prefetchable) [size=256M]
        Region 3: Memory at b1000000 (64-bit, non-prefetchable) [size=16M]
        Capabilities: [48] Power Management version 2
                Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA
PME(D0-,D1-,D2-,D3hot-,D3cold-)
                Status: D0 PME-Enable- DSel=0 DScale=0 PME-
        Capabilities: [50] Message Signalled Interrupts: Mask- 64bit+ Queue=0/0
Enable-
                Address: 0000000000000000  Data: 0000
        Kernel modules: nvidiafb
-------------------------------------------------------------------------
carl at castlereagh:~$ lshal
[snip]
udi = '/org/freedesktop/Hal/devices/pci_10de_244'
  info.parent = '/org/freedesktop/Hal/devices/computer'  (string)
  info.product = 'C51 [Geforce 6150 Go]'  (string)
  info.subsystem = 'pci'  (string)
  info.udi = '/org/freedesktop/Hal/devices/pci_10de_244'  (string)
  info.vendor = 'nVidia Corporation'  (string)
  linux.hotplug_type = 2  (0x2)  (int)
  linux.subsystem = 'pci'  (string)
  linux.sysfs_path = '/sys/devices/pci0000:00/0000:00:05.0'  (string)
  pci.device_class = 3  (0x3)  (int)
  pci.device_protocol = 0  (0x0)  (int)
  pci.device_subclass = 0  (0x0)  (int)
  pci.linux.sysfs_path = '/sys/devices/pci0000:00/0000:00:05.0' 
(string)
  pci.product = 'C51 [Geforce 6150 Go]'  (string)
  pci.product_id = 580  (0x244)  (int)
  pci.subsys_product_id = 12479  (0x30bf)  (int)
  pci.subsys_vendor = 'Hewlett-Packard Company'  (string)
  pci.subsys_vendor_id = 4156  (0x103c)  (int)
  pci.vendor = 'nVidia Corporation'  (string)
  pci.vendor_id = 4318  (0x10de)  (int)
[snip]


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--- Comment #1 from Carl van Tonder <simplyw00x at gmail.com>  2008-05-15
17:54:44 PST ---
Created an attachment (id=16563)
 --> (http://bugs.freedesktop.org/attachment.cgi?id=16563)
Top-left corner of LVDS-0


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--- Comment #2 from Carl van Tonder <simplyw00x at gmail.com>  2008-05-15
17:55:36 PST ---
Created an attachment (id=16564)
 --> (http://bugs.freedesktop.org/attachment.cgi?id=16564)
Top-right corner of LVDS-0


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--- Comment #3 from Carl van Tonder <simplyw00x at gmail.com>  2008-05-15
17:56:44 PST ---
Created an attachment (id=16565)
 --> (http://bugs.freedesktop.org/attachment.cgi?id=16565)
xog.conf


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--- Comment #4 from Stuart Bennett <sb476 at cam.ac.uk>  2008-05-16
15:00:55 PST ---
Does the problem happen when not using nvidiafb? Is this effect still visible
when starting X (from a good initial state) without the VGA head plugged? Do
different modes affect it (it seems to be starting in a 1024x768 mode below; is
it setting 1280x800 that breaks it)?


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--- Comment #5 from Carl van Tonder <simplyw00x at gmail.com>  2008-05-22
05:40:02 PST ---
>> Does the problem happen when not using nvidiafb?
AFAIK I'm not using it. It doesn't show up in lsmod, at any rate
>> Is this effect still visible
when starting X (from a good initial state) without the VGA head plugged?
If I set the laptop to a resolution at which the screen wraps, then reboot it
with no external monitor plugged in, the problem persists.
>> Do
different modes affect it (it seems to be starting in a 1024x768 mode below; is
it setting 1280x800 that breaks it)?
12800x800 is the only ode I've been able to find that actually fills the
screen
--- it's a 16:10 and resolutions like 1024x786 show up in the centre with
vertical letterboxing.


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Joel <joel.stan at gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |joel.stan at gmail.com




--- Comment #6 from Joel <joel.stan at gmail.com>  2008-08-09 21:33:48 PST
---
I see this too on a HP Pavilion tx1000 - the screen is wraps ~10 pixels from
the right side over to the left.  This is with the LDVS panel, I haven't
tested
VGA.

Using nouveau git from 20080801, and xserver 1.4.99.906 on Ubuntu Intrepid.

Logs can be found at http://verbal.mithis.com/~shenki/nouveau/


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--- Comment #7 from Carl van Tonder <simplyw00x at gmail.com>  2008-08-10
11:01:44 PST ---
This bug has persisted since first report despite:
 * Changing distro (Ubuntu -> Fedora)
 * Updating nouveau drm and x module to git head on a weekly basis
 * Changing kernel (whatever Ubuntu was on to 2.6.25.11-97.fc9.i686
hence it does seem to be a genuine bug with nouveau. For me the wrapping is now
confirmed as exactly 15px.


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--- Comment #8 from Stuart Bennett <sb476 at cam.ac.uk>  2008-08-10
17:01:56 PST ---
Just to be sure, can you confirm that once the wrapping has occurred, either
returning to VT or starting X with randr12 disabled still displays the
wrapping?

Please also make register dumps while in X -- one with randr12 disabled (and no
wrapping present), and one with the wrapping present -- as follows:

git clone git://people.freedesktop.org/~airlied/radeontool
git checkout origin/nvidia
make (if there's problems with the asm/page.h include, comment it out)
./radeontool regs > logfile


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--- Comment #9 from Joel <joel.stan at gmail.com>  2008-08-11 19:34:30 PST
---
(In reply to comment #8)
> Just to be sure, can you confirm that once the wrapping has occurred,
either
> returning to VT or starting X with randr12 disabled still displays the
> wrapping?
If the wrapping is present, I can switch to a vt (where wrapping is not
present), but switching back to X still shows wrapping.

I then modified xorg.conf to disable randr12, re-started X, there is no
wrapping.

> Please also make register dumps while in X -- one with randr12 disabled
(and no
> wrapping present), and one with the wrapping present -- as follows:
> 
> git clone git://people.freedesktop.org/~airlied/radeontool
> git checkout origin/nvidia
> make (if there's problems with the asm/page.h include, comment it out)
> ./radeontool regs > logfile
This is all I get (amd64, ubuntu intrepid):

$ sudo ./radeontool regs
00:00.0 RAM memory: nVidia Corporation C51 Host Bridge (rev a2)
        Subsystem: Hewlett-Packard Company Device 30bf
        Flags: bus master, 66MHz, fast devsel, latency 0
        Capabilities: [44] HyperTransport: Slave or Primary Interface
        Capabilities: [e0] HyperTransport: MSI Mapping Enable+ Fixed-
Radeon control memory not found.


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--- Comment #10 from Stuart Bennett <sb476 at cam.ac.uk>  2008-08-12
07:55:20 PST ---
(In reply to comment #9)
> If the wrapping is present, I can switch to a vt (where wrapping is not
> present), but switching back to X still shows wrapping.
> 
> I then modified xorg.conf to disable randr12, re-started X, there is no
> wrapping.
Without a reboot in between, right?
> > git clone git://people.freedesktop.org/~airlied/radeontool
> > git checkout origin/nvidia
> > make (if there's problems with the asm/page.h include, comment it
out)
> > ./radeontool regs > logfile
> 
> This is all I get (amd64, ubuntu intrepid):
> 
> $ sudo ./radeontool regs
> 00:00.0 RAM memory: nVidia Corporation C51 Host Bridge (rev a2)
>         Subsystem: Hewlett-Packard Company Device 30bf
>         Flags: bus master, 66MHz, fast devsel, latency 0
>         Capabilities: [44] HyperTransport: Slave or Primary Interface
>         Capabilities: [e0] HyperTransport: MSI Mapping Enable+ Fixed-
> Radeon control memory not found.
Bah, nvidia chipset :)

Try changing line ~478, replacing "nVidia" with "VGA compatible
controller":

@@ -475,7 +475,7 @@ We need to look through it to find the smaller region base
address f8fffc00.
        if(fgets(line,sizeof(line),fp) == NULL) {  /* if end of file */
           fatal("Radeon hardware not found in lspci output.\n");
        }
-       if(strstr(line,"nVidia") || strstr(line,"nVidia
Corp")) {  /* if line
contains a "radeon" string */
+       if(strstr(line,"VGA compatible controller") ||
strstr(line,"nVidia
Corp")) {  /* if line contains a "radeon"
           if(skip-- < 1) {
              break;
           }

then re-run make and try again


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--- Comment #11 from Joel <joel.stan at gmail.com>  2008-08-13 04:15:08
PST ---
(In reply to comment #10)
> > I then modified xorg.conf to disable randr12, re-started X, there is
no
> > wrapping.
> 
> Without a reboot in between, right?
Correct.
> Try changing line ~478, replacing "nVidia" with "VGA
compatible controller":
> 
> @@ -475,7 +475,7 @@ We need to look through it to find the smaller region
base
> address f8fffc00.
>         if(fgets(line,sizeof(line),fp) == NULL) {  /* if end of file */
>            fatal("Radeon hardware not found in lspci output.\n");
>         }
> -       if(strstr(line,"nVidia") || strstr(line,"nVidia
Corp")) {  /* if line
> contains a "radeon" string */
> +       if(strstr(line,"VGA compatible controller") ||
strstr(line,"nVidia
> Corp")) {  /* if line contains a "radeon"
>            if(skip-- < 1) {
>               break;
>            }

For those who read this later: I had to remove the strstr(line, "nVidia
Corp")
from the if too, or else it would incorrectly match on that.

Attachments of the register dumps follow.


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--- Comment #12 from Joel <joel.stan at gmail.com>  2008-08-13 04:16:16
PST ---
Created an attachment (id=18260)
 --> (http://bugs.freedesktop.org/attachment.cgi?id=18260)
radeontool register dump, randr12 enabled, cold boot


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--- Comment #13 from Joel <joel.stan at gmail.com>  2008-08-13 04:19:35
PST ---
Created an attachment (id=18261)
 --> (http://bugs.freedesktop.org/attachment.cgi?id=18261)
radeontool register dump, randr12 disabled

No reboot between this dump and attachment 18260, only an X server restart.


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--- Comment #14 from Stuart Bennett <sb476 at cam.ac.uk>  2008-08-13
11:03:19 PST ---
Three things to try (try them individually first, then if no success, try them
together), then add to the bug which one or which combination works (if any).

1) use a different 1280x800 mode at runtime:

xrandr --newmode "1280x800R"   71.00  1280 1328 1360 1440  800 803 809
823
xrandr --addmode LVDS-0 1280x800R
xrandr --output LVDS-0 --mode 1280x800R

2) hard code panel size in nv_crtc.c (then re-run make install etc):

@@ -945,7 +945,7 @@ nv_crtc_mode_set_fp_regs(xf86CrtcPtr crtc, DisplayModePtr
mode, DisplayModePtr a

        regp->fp_horiz_regs[REG_DISP_END] = adjusted_mode->HDisplay - 1;
        regp->fp_horiz_regs[REG_DISP_TOTAL] = adjusted_mode->HTotal - 1;
-       regp->fp_horiz_regs[REG_DISP_CRTC] = adjusted_mode->HSyncStart -
75 -
1;
+       regp->fp_horiz_regs[REG_DISP_CRTC] = 0x500;
        regp->fp_horiz_regs[REG_DISP_SYNC_START] =
adjusted_mode->HSyncStart -
1;
        regp->fp_horiz_regs[REG_DISP_SYNC_END] = adjusted_mode->HSyncEnd -
1;
        regp->fp_horiz_regs[REG_DISP_VALID_START] = adjusted_mode->HSkew;
@@ -953,7 +953,7 @@ nv_crtc_mode_set_fp_regs(xf86CrtcPtr crtc, DisplayModePtr
mode, DisplayModePtr a

        regp->fp_vert_regs[REG_DISP_END] = adjusted_mode->VDisplay - 1;
        regp->fp_vert_regs[REG_DISP_TOTAL] = adjusted_mode->VTotal - 1;
-       regp->fp_vert_regs[REG_DISP_CRTC] = adjusted_mode->VTotal - 5 - 1;
+       regp->fp_vert_regs[REG_DISP_CRTC] = 0x320;
        regp->fp_vert_regs[REG_DISP_SYNC_START] =
adjusted_mode->VSyncStart -
1;
        regp->fp_vert_regs[REG_DISP_SYNC_END] = adjusted_mode->VSyncEnd -
1;
        regp->fp_vert_regs[REG_DISP_VALID_START] = 0;

3) change a flag register in nv_crtc.c (then re-run make install etc):

@@ -1018,7 +1018,7 @@ nv_crtc_mode_set_fp_regs(xf86CrtcPtr crtc, DisplayModePtr
mode, DisplayModePtr a
                regp->fp_control |= (8 << 28);

        /* Use the generic value, and enable x-scaling, y-scaling, and the TMDS
enable bit */
-       regp->debug_0 = 0x01101191;
+       regp->debug_0 = 0x01141191;
        /* We want automatic scaling */
        regp->debug_1 = 0;
        /* This can override HTOTAL and VTOTAL */


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--- Comment #15 from Joel <joel.stan at gmail.com>  2008-08-15 07:52:17
PST ---
(In reply to comment #14)
> 1) use a different 1280x800 mode at runtime
Didn't work.
> 2) hard code panel size in nv_crtc.c
Worked!

In case it's useful, here's what the driver had calculated for the
offending
values:

 adjusted_mode->HSyncStart - 75 -1 = 0x578

 adjusted_mode->VTotal - 5 - 1 = 0x326
> 3) change a flag register in nv_crtc.c
Err, wrong button :)

That one produced an artistic combination of black alternating vertical lines
and a vertically stretched image (we could only see the top 1/3 of the screen
on the panel).


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--- Comment #16 from Stuart Bennett <sb476 at cam.ac.uk>  2008-08-15
16:41:53 PST ---
Created an attachment (id=18310)
 --> (http://bugs.freedesktop.org/attachment.cgi?id=18310)
Probable fix

Could you both test this please?


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--- Comment #17 from Joel <joel.stan at gmail.com>  2008-08-15 20:55:53
PST ---
(In reply to comment #16)
> Created an attachment (id=18310)
 --> (http://bugs.freedesktop.org/attachment.cgi?id=18310)
[details]
> Probable fix
Works for me.

Thanks!


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--- Comment #18 from Carl van Tonder <simplyw00x at gmail.com>  2008-08-16
11:01:12 PST ---
(In reply to comment #16)
> Created an attachment (id=18310)
 --> (http://bugs.freedesktop.org/attachment.cgi?id=18310)
[details]
> Probable fix
> 
> Could you both test this please?
> 
Fixed my instance of the problem too. Thanks a lot!


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Stuart Bennett <sb476 at cam.ac.uk> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |FIXED




--- Comment #19 from Stuart Bennett <sb476 at cam.ac.uk>  2008-08-16
14:14:27 PST ---
Patch applied


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