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[Xen-users] xen 3.0.3: blank screen in xserver-xorg in dom0



I was happily using an unstable version of xen built July from source (pre 3.0.3) and I downloaded the 3.0.3 source and built it using:

# make world
# make install

dom0 boots ok, but when the the xorg xserver starts I just get a blank screen - I think it's not picking up the right modes.

(BTW - 640x480 does work, but it's the only resolution that works).

It's really strange, because xorg.conf is the same whether it's runinng under Xen or a normal kernel. Here's a diff between the xorg log starting on a normal kernel and the xen 3.0.3 kernel:



6c6
< Current Operating System: Linux eir 2.6.17.4-eir #1 SMP Tue Jul 11 12:19:50 EST 2006 i686
---
> Current Operating System: Linux eir 2.6.16.29-xen #1 SMP Sun Oct 22 19:30:13 EST 2006 i686
14c14
< (==) Log file: "/var/log/Xorg.0.log", Time: Mon Oct 23 09:44:56 2006
---
> (==) Log file: "/var/log/Xorg.0.log", Time: Mon Oct 23 09:41:44 2006
436,486c436
< (II) VESA(0): VESA VBE DDC supported
< (II) VESA(0): VESA VBE DDC Level 2
< (II) VESA(0): VESA VBE DDC transfer in appr. 1 sec.
< (II) VESA(0): VESA VBE DDC read successfully
< (II) VESA(0): Manufacturer: MEL  Model: 4625  Serial#: 16843009
< (II) VESA(0): Year: 2003  Week: 18
< (II) VESA(0): EDID Version: 1.3
< (II) VESA(0): Analog Display Input,  Input Voltage Level: 0.700/0.300 V
< (II) VESA(0): Sync:  Separate  Composite
< (II) VESA(0): Max H-Image Size [cm]: horiz.: 37  vert.: 27
< (II) VESA(0): Gamma: 2.20
< (II) VESA(0): DPMS capabilities: StandBy Suspend Off; RGB/Color Display
< (II) VESA(0): First detailed timing is preferred mode
< (II) VESA(0): GTF timings supported
< (II) VESA(0): redX: 0.626 redY: 0.339   greenX: 0.279 greenY: 0.600
< (II) VESA(0): blueX: 0.149 blueY: 0.072   whiteX: 0.283 whiteY: 0.297
< (II) VESA(0): Supported VESA Video Modes:
< (II) VESA(0): 720x400@70Hz
< (II) VESA(0): 720x400@88Hz
< (II) VESA(0): 640x480@60Hz
< (II) VESA(0): 640x480@67Hz
< (II) VESA(0): 640x480@72Hz
< (II) VESA(0): 640x480@75Hz
< (II) VESA(0): 800x600@56Hz
< (II) VESA(0): 800x600@60Hz
< (II) VESA(0): 800x600@72Hz
< (II) VESA(0): 800x600@75Hz
< (II) VESA(0): 832x624@75Hz
< (II) VESA(0): 1024x768@87Hz (interlaced)
< (II) VESA(0): 1024x768@60Hz
< (II) VESA(0): 1024x768@70Hz
< (II) VESA(0): 1024x768@75Hz
< (II) VESA(0): 1280x1024@75Hz
< (II) VESA(0): 1152x870@75Hz
< (II) VESA(0): Manufacturer's mask: 0
< (II) VESA(0): Supported Future Video Modes:
< (II) VESA(0): #0: hsize: 640  vsize 480  refresh: 85  vid: 22833
< (II) VESA(0): #1: hsize: 800  vsize 600  refresh: 85  vid: 22853
< (II) VESA(0): #2: hsize: 1024  vsize 768  refresh: 85  vid: 22881
< (II) VESA(0): #3: hsize: 1152  vsize 864  refresh: 75  vid: 20337
< (II) VESA(0): #4: hsize: 1280  vsize 960  refresh: 85  vid: 22913
< (II) VESA(0): #5: hsize: 1280  vsize 1024  refresh: 85  vid: 39297
< (II) VESA(0): #6: hsize: 1600  vsize 1200  refresh: 75  vid: 20393
< (II) VESA(0): #7: hsize: 1792  vsize 1344  refresh: 65  vid: 17857
< (II) VESA(0): Supported additional Video Mode:
< (II) VESA(0): clock: 157.5 MHz   Image Size:  356 x 266 mm
< (II) VESA(0): h_active: 1280 h_sync: 1344 h_sync_end 1504 h_blank_end 1728 h_border: 0 < (II) VESA(0): v_active: 1024 v_sync: 1025 v_sync_end 1028 v_blanking: 1072 v_border: 0 < (II) VESA(0): Ranges: V min: 50 V max: 160 Hz, H min: 30 H max: 96 kHz, PixClock max 230 MHz
< (II) VESA(0): Monitor name: DPLUS93SB
< (II) VESA(0): Serial No: 3500101YR
---
> (II) VESA(0): VESA VBE DDC not supported
517c467
<     PhysBasePtr: 0xe0000000
---
>     PhysBasePtr: 0x0
559c509
<     PhysBasePtr: 0xe0000000
---
>     PhysBasePtr: 0x0
643c593
<     PhysBasePtr: 0xe0000000
---
>     PhysBasePtr: 0x0
727c677
<     PhysBasePtr: 0xe0000000
---
>     PhysBasePtr: 0x0
811c761
<     PhysBasePtr: 0xe0000000
---
>     PhysBasePtr: 0x0
853c803
<     PhysBasePtr: 0xe0000000
---
>     PhysBasePtr: 0x0
895c845
<     PhysBasePtr: 0xe0000000
---
>     PhysBasePtr: 0x0
937c887
<     PhysBasePtr: 0xe0000000
---
>     PhysBasePtr: 0x0
979c929
<     PhysBasePtr: 0xe0000000
---
>     PhysBasePtr: 0x0
1021c971
<     PhysBasePtr: 0xe0000000
---
>     PhysBasePtr: 0x0
1063c1013
<     PhysBasePtr: 0xe0000000
---
>     PhysBasePtr: 0x0
1105c1055
<     PhysBasePtr: 0xe0000000
---
>     PhysBasePtr: 0x0
1147c1097
<     PhysBasePtr: 0xe0000000
---
>     PhysBasePtr: 0x0
1189c1139
<     PhysBasePtr: 0xe0000000
---
>     PhysBasePtr: 0x0
1231c1181
<     PhysBasePtr: 0xe0000000
---
>     PhysBasePtr: 0x0
1273c1223
<     PhysBasePtr: 0xe0000000
---
>     PhysBasePtr: 0x0
1315c1265
<     PhysBasePtr: 0xe0000000
---
>     PhysBasePtr: 0x0
1357c1307
<     PhysBasePtr: 0xe0000000
---
>     PhysBasePtr: 0x0
1399c1349
<     PhysBasePtr: 0xe0000000
---
>     PhysBasePtr: 0x0
1441c1391
<     PhysBasePtr: 0xe0000000
---
>     PhysBasePtr: 0x0
1483c1433
<     PhysBasePtr: 0xe0000000
---
>     PhysBasePtr: 0x0
1525c1475
<     PhysBasePtr: 0xe0000000
---
>     PhysBasePtr: 0x0
1567c1517
<     PhysBasePtr: 0xe0000000
---
>     PhysBasePtr: 0x0
1609c1559
<     PhysBasePtr: 0xe0000000
---
>     PhysBasePtr: 0x0
1651c1601
<     PhysBasePtr: 0xe0000000
---
>     PhysBasePtr: 0x0
1693c1643
<     PhysBasePtr: 0xe0000000
---
>     PhysBasePtr: 0x0
1735c1685
<     PhysBasePtr: 0xe0000000
---
>     PhysBasePtr: 0x0
1777c1727
<     PhysBasePtr: 0xe0000000
---
>     PhysBasePtr: 0x0
1790d1739
< *(WW) (2048x1536,DPLUS93SB) mode clock 266.95MHz exceeds DDC maximum 230MHz
1820c1769
<     PhysBasePtr: 0xe0000000
---
>     PhysBasePtr: 0x0
1835,1836c1784,1785
< (II) VESA(0): DPLUS93SB: Using default hsync range of 30.00-96.00 kHz
< (II) VESA(0): DPLUS93SB: Using default vrefresh range of 50.00-160.00 Hz
---
> (II) VESA(0): DPLUS93SB: Using default hsync range of 28.00-33.00 kHz
> (II) VESA(0): DPLUS93SB: Using default vrefresh range of 43.00-72.00 Hz
1842d1790
< (II) VESA(0): Not using built-in mode "2048x1536" (width too large for virtual size)
1850,1854c1798
< (II) VESA(0): Attempting to use 85Hz refresh for mode "1280x1024" (11b)
< (II) VESA(0): Attempting to use 85Hz refresh for mode "1024x768" (118)
< (II) VESA(0): Attempting to use 85Hz refresh for mode "800x600" (115)
< (II) VESA(0): Attempting to use 85Hz refresh for mode "640x480" (112)
< (II) VESA(0): Attempting to use 85Hz refresh for mode "640x400" (13e)
---
> (II) VESA(0): Attempting to use 60Hz refresh for mode "640x480" (112)
1921,1922c1865,1866
< (II) VESA(0): virtual address = 0xb38cb000,
<     physical address = 0xe0000000, size = 67108864
---
> (II) VESA(0): virtual address = 0xb78d5000,
>     physical address = 0xa0000, size = 65536
1973a1918
> (II) Configured Mouse: ps2EnableDataReporting: succeeded




The main difference beteween the blank screen and the ok screen is that when the display works, I get "VESA VBE DDC supported" but when it goes blank I get "VESA VBE DDC not supported". I'm guessing that because DDC doesn't work under xen 3.0.3 it's not picking up the right modes and my xorg.conf doesn't work. Here's xorg.conf:



# /etc/X11/xorg.conf (xorg X Window System server configuration file)
#
# This file was generated by dexconf, the Debian X Configuration tool, using
# values from the debconf database.
#
# Edit this file with caution, and see the /etc/X11/xorg.conf manual page.
# (Type "man /etc/X11/xorg.conf" at the shell prompt.)
#
# This file is automatically updated on xserver-xorg package upgrades *only*
# if it has not been modified since the last upgrade of the xserver-xorg
# package.
#
# If you have edited this file but would like it to be automatically updated
# again, run the following command:
#   sudo dpkg-reconfigure -phigh xserver-xorg

Section "Files"
   FontPath    "/usr/share/fonts/X11/misc"
   FontPath    "/usr/X11R6/lib/X11/fonts/misc"
   FontPath    "/usr/share/fonts/X11/cyrillic"
   FontPath    "/usr/X11R6/lib/X11/fonts/cyrillic"
   FontPath    "/usr/share/fonts/X11/100dpi/:unscaled"
   FontPath    "/usr/X11R6/lib/X11/fonts/100dpi/:unscaled"
   FontPath    "/usr/share/fonts/X11/75dpi/:unscaled"
   FontPath    "/usr/X11R6/lib/X11/fonts/75dpi/:unscaled"
   FontPath    "/usr/share/fonts/X11/Type1"
   FontPath    "/usr/X11R6/lib/X11/fonts/Type1"
   FontPath    "/usr/share/fonts/X11/100dpi"
   FontPath    "/usr/X11R6/lib/X11/fonts/100dpi"
   FontPath    "/usr/share/fonts/X11/75dpi"
   FontPath    "/usr/X11R6/lib/X11/fonts/75dpi"
   # path to defoma fonts
   FontPath    "/var/lib/defoma/x-ttcidfont-conf.d/dirs/TrueType"
EndSection

Section "Module"
   Load    "i2c"
   Load    "bitmap"
   Load    "ddc"
   Load    "dri"
   Load    "extmod"
   Load    "freetype"
   Load    "glx"
   Load    "int10"
   Load    "type1"
   Load    "vbe"
EndSection

Section "InputDevice"
   Identifier    "Generic Keyboard"
   Driver        "kbd"
   Option        "CoreKeyboard"
   Option        "XkbRules"    "xorg"
   Option        "XkbModel"    "pc104"
   Option        "XkbLayout"    "us"
EndSection

Section "InputDevice"
   Identifier    "Configured Mouse"
   Driver        "mouse"
   Option        "CorePointer"
   Option        "Device"        "/dev/input/mice"
   Option        "Protocol"        "ExplorerPS/2"
   Option        "Emulate3Buttons"    "true"
EndSection

Section "Device"
   Identifier    "Generic Video Card"
   Driver        "vesa"
   BusID        "PCI:0:5:0"
EndSection

Section "Monitor"
   Identifier    "DPLUS93SB"
   Option        "DPMS"
EndSection

Section "Screen"
   Identifier    "Default Screen"
   Device        "Generic Video Card"
   Monitor        "DPLUS93SB"
   DefaultDepth    24
   SubSection "Display"
       Depth        1
Modes "1600x1200" "1280x1024" "1280x960" "1152x864" "1024x768" "832x624" "800x600" "720x400" "640x480"
   EndSubSection
   SubSection "Display"
       Depth        4
Modes "1600x1200" "1280x1024" "1280x960" "1152x864" "1024x768" "832x624" "800x600" "720x400" "640x480"
   EndSubSection
   SubSection "Display"
       Depth        8
Modes "1600x1200" "1280x1024" "1280x960" "1152x864" "1024x768" "832x624" "800x600" "720x400" "640x480"
   EndSubSection
   SubSection "Display"
       Depth        15
Modes "1600x1200" "1280x1024" "1280x960" "1152x864" "1024x768" "832x624" "800x600" "720x400" "640x480"
   EndSubSection
   SubSection "Display"
       Depth        16
Modes "1600x1200" "1280x1024" "1280x960" "1152x864" "1024x768" "832x624" "800x600" "720x400" "640x480"
   EndSubSection
   SubSection "Display"
       Depth        24
Modes "1600x1200" "1280x1024" "1280x960" "1152x864" "1024x768" "832x624" "800x600" "720x400" "640x480"
   EndSubSection
EndSection

Section "ServerLayout"
   Identifier    "Default Layout"
   Screen        "Default Screen"
   InputDevice    "Generic Keyboard"
   InputDevice    "Configured Mouse"
EndSection

Section "DRI"
   Mode    0666
EndSection





As I said before, my previous build of Xen works fine. Here's the difference in the kernel config files between an unstable build of Xen from July and the latest unstable post 3.0.3 version:



3,4c3,4
< # Linux kernel version: 2.6.16.13-xen
< # Tue Jul 11 14:40:35 2006
---
> # Linux kernel version: 2.6.16.29-xen
> # Mon Oct 23 13:37:44 2006
192a193
> CONFIG_ARCH_ENABLE_MEMORY_HOTPLUG=y
2379c2380
< CONFIG_SND_FM801_TEA575X=m
---
> # CONFIG_SND_FM801_TEA575X_BOOL is not set
3012c3013
< CONFIG_XEN_INTERFACE_VERSION=0x00030202
---
> CONFIG_XEN_INTERFACE_VERSION=0x00030203
3019a3021
> CONFIG_XEN_XENBUS_DEV=y
3021,3024d3022
< CONFIG_XEN_PCIDEV_BACKEND=m
< CONFIG_XEN_PCIDEV_BACKEND_VPCI=y
< # CONFIG_XEN_PCIDEV_BACKEND_PASS is not set
< # CONFIG_XEN_PCIDEV_BE_DEBUG is not set
3026c3024
< CONFIG_XEN_XENBUS_DEV=y
---
> CONFIG_XEN_BLKDEV_TAP=y
3029a3028,3032
> CONFIG_XEN_PCIDEV_BACKEND=m
> CONFIG_XEN_PCIDEV_BACKEND_VPCI=y
> # CONFIG_XEN_PCIDEV_BACKEND_PASS is not set
> # CONFIG_XEN_PCIDEV_BACKEND_SLOT is not set
> # CONFIG_XEN_PCIDEV_BE_DEBUG is not set





Does anyone know why this might be happening? Is it because of a kernel difference between Xen 3.0.3 and Xen 3.0.2? Is it because of a difference in kernel configuration?


Any help given will be really appreciated!!

Yasir


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