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<base href="https://bugs.freedesktop.org/" />
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<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Priority</th>
<td>medium
</td>
</tr>
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - i3-3227U's HD4000 fails to work"
href="https://bugs.freedesktop.org/show_bug.cgi?id=79146">79146</a>
</td>
</tr>
<tr>
<th>Assignee</th>
<td>chris@chris-wilson.co.uk
</td>
</tr>
<tr>
<th>Summary</th>
<td>i3-3227U's HD4000 fails to work
</td>
</tr>
<tr>
<th>QA Contact</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Severity</th>
<td>critical
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr>
<tr>
<th>OS</th>
<td>Linux (All)
</td>
</tr>
<tr>
<th>Reporter</th>
<td>etkids@163.com
</td>
</tr>
<tr>
<th>Hardware</th>
<td>x86-64 (AMD64)
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</td>
</tr>
<tr>
<th>Component</th>
<td>Driver/intel
</td>
</tr>
<tr>
<th>Product</th>
<td>xorg
</td>
</tr></table>
<p>
<div>
<pre>The model of my laptop is Acer V7-481 which comes with an [B]i3-3227U[/B] CPU
and [B]NO[/B] graphic card.
When I was installing ubuntu 12.04 for the first time, the laptop booted up in
a black screen
The only solution to this is to add a boot parameter nomodeset or something to
disable the KMS.
Other solutions I found are useless, including acpi related and adjust the
backlight using shortcuts etc.
Now, my laptop can ONLY boot with NOMODESET but I don't think the integrated
graphic card is functioning normally.
NOTE:This happens on distros that doesn't have a GUI
1. I cannot connect to a second monitor via HDMI and Display Port
2. unity is running in 2d mode
3. can't use 3d hardware acceleration
4. cannot change backlight with shortcuts
The back light is on without nomodeset and can be adjusted by keyboard shortcut
however, with nomodest, I can't change the back light.
out put of `uname -a`
`Linux v7 3.13.0-24-generic #47-Ubuntu SMP Fri May 2 23:30:00 UTC 2014 x86_64
x86_64 x86_64 GNU/Linux`
out put of `lshw -c video`
```
*-display UNCLAIMED
description: VGA compatible controller
product: 3rd Gen Core processor Graphics Controller
vendor: Intel Corporation
physical id: 2
bus info: pci@0000:00:02.0
version: 09
width: 64 bits
clock: 33MHz
capabilities: msi pm vga_controller bus_master cap_list
configuration: latency=0
resources: memory:c0000000-c03fffff memory:b0000000-bfffffff
ioport:3000(size=64)
```</pre>
</div>
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