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[Zhang Weiwu <zhangweiwu@xxxxxxxxxx>]

If I had HDMI turned off to start with, your method would not turn it
on. There was no error message in the complete process following your
instruction, but HDMI display shows 'no signal'.

$ sudo /usr/sbin/ch7036_start 
/usr/sbin/ch7036_monitor: starts
Found device ID 0x56
Found revision ID 0x81
Mode 1024x768 (95)
1024x768, dot clock 65000000  -Hsync -Vsync
H: start 1048, end 1184, skew 0, total 1344
V: start 771, end 777, total 806
Firmware size = 3295 bytes.

As said, the device works on Windows 7.

I down-tuned the resolution, because even on Windows 7, the max
resolution offered for HDMI is 1280x720, smaller than LVDS's native
resolution and CH7036's advertised max resolution (both are 1366x768).

As you can see the resolution is 1024x768, that means in Linux I down-
tuned it even lower than Windows 7, because in xrandr, the next
resolution below 1366x768 is 1024x768.

 I was rather surprised when I look up the specs of WeTab and found that
bModo has exactly the same configuration, including CPU type, memory,
hard disk space and resolution. It really look like bModo 12 is just
another casing of WeTab.

-- 
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https://bugs.launchpad.net/bugs/1123943

Title:
  Chrontel CH7036 chip not supported

Status in “linux” package in Ubuntu:
  Triaged

Bug description:
  I'm running a WeTab with ubuntu and the ch7036 chip is not supported.
  There is a driver for the chromebook (called chrontel), but that driver is more or less a hacked daemon that sends some data to the chip and gives me the following error message:

  Found device ID 0x56
  Found revision ID 0x81
  Mode 1366x786 (44)
  1366y786, dot clock 69300000  -Hsync -Vsync
  H: start 1414, end 1446, skew 0, total 1456
  V: start 771, end 777, total 793
  State: 0
  Firmware size = 3295 bytes.
  State: 2
  State: 3
  Timeout waiting for MCU to return EDID
  CH7036 MCU ver 1.41, Device 56 rev 1 capability 0x1
  EDID timed out: Ignore HPD because EDID failed just after firmware load
  Get EDOD Failed (initial block) using 640x480@60
  Could not find a useful resolution. Maybe hardware problem.

  ProblemType: Bug
  DistroRelease: Ubuntu 13.04
  Package: xorg 1:7.7+1ubuntu4
  ProcVersionSignature: Ubuntu 3.8.0-6.11-generic 3.8.0-rc7
  Uname: Linux 3.8.0-6-generic i686
  .tmp.unity.support.test.0:
   
  ApportVersion: 2.8-0ubuntu4
  Architecture: i386
  CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
  CompositorRunning: compiz
  Date: Wed Feb 13 10:46:06 2013
  DistUpgraded: Fresh install
  DistroCodename: raring
  DistroVariant: ubuntu
  ExtraDebuggingInterest: Yes, including running git bisection searches
  GraphicsCard:
   Intel Corporation Atom Processor D4xx/D5xx/N4xx/N5xx Integrated Graphics Controller [8086:a011] (prog-if 00 [VGA controller])
     Subsystem: Device [1b0a:00c7]
     Subsystem: Device [1b0a:00c7]
  InstallationDate: Installed on 2013-02-08 (4 days ago)
  InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Release i386 (20121017.2)
  MachineType: PEGATRON WeTab
  MarkForUpload: True
  ProcEnviron:
   TERM=xterm
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=de_DE.UTF-8
   SHELL=/bin/bash
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.8.0-6-generic root=UUID=7cedb257-8646-45d8-a06b-c1a32d485cec ro quiet splash vt.handoff=7
  SourcePackage: xorg
  Symptom: display
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 11/19/2010
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: Lucid-GE-133
  dmi.board.asset.tag: To be filled by O.E.M.
  dmi.board.name: WeTab
  dmi.board.vendor: PEGATRON
  dmi.board.version: 30011578
  dmi.chassis.asset.tag: To Be Filled By O.E.M.
  dmi.chassis.type: 1
  dmi.chassis.vendor: PEGATRON
  dmi.chassis.version: TT116A01
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrLucid-GE-133:bd11/19/2010:svnPEGATRON:pnWeTab:pvrTT116A01:rvnPEGATRON:rnWeTab:rvr30011578:cvnPEGATRON:ct1:cvrTT116A01:
  dmi.product.name: WeTab
  dmi.product.version: TT116A01
  dmi.sys.vendor: PEGATRON
  version.compiz: compiz 1:0.9.9~daily13.02.08-0ubuntu1
  version.libdrm2: libdrm2 2.4.42-0ubuntu1
  version.libgl1-mesa-dri: libgl1-mesa-dri 9.0.2-0ubuntu1
  version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
  version.libgl1-mesa-glx: libgl1-mesa-glx 9.0.2-0ubuntu1
  version.xserver-xorg-core: xserver-xorg-core 2:1.13.2-0ubuntu2
  version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.7.3-0ubuntu2
  version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.1.0-0ubuntu1
  version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.21.2-0ubuntu1
  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.6-0ubuntu2
  xserver.bootTime: Wed Feb 13 10:45:09 2013
  xserver.configfile: default
  xserver.errors:
   
  xserver.logfile: /var/log/Xorg.0.log
  xserver.version: 2:1.13.2-0ubuntu2
  xserver.video_driver: intel

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