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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - i915 driver isn't used for Broadwell-U GPU in Lenovo Helix 2"
href="https://bugs.freedesktop.org/show_bug.cgi?id=88797">88797</a>
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<th>Summary</th>
<td>i915 driver isn't used for Broadwell-U GPU in Lenovo Helix 2
</td>
</tr>
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<th>Product</th>
<td>DRI
</td>
</tr>
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<th>Version</th>
<td>unspecified
</td>
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<th>Hardware</th>
<td>x86-64 (AMD64)
</td>
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<th>OS</th>
<td>Linux (All)
</td>
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<th>Status</th>
<td>NEW
</td>
</tr>
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<th>Severity</th>
<td>major
</td>
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<th>Priority</th>
<td>medium
</td>
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<th>Component</th>
<td>DRM/Intel
</td>
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<th>Assignee</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
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<th>Reporter</th>
<td>andrew@etc.gen.nz
</td>
</tr>
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<th>QA Contact</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
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<th>CC</th>
<td>intel-gfx-bugs@lists.freedesktop.org, rodrigo.vivi@gmail.com
</td>
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<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=112827" name="attach_112827" title="dmesg output with drm.debug=0xe">attachment 112827</a> <a href="attachment.cgi?id=112827&action=edit" title="dmesg output with drm.debug=0xe">[details]</a></span>
dmesg output with drm.debug=0xe
[Recreated here from <a href="https://bugzilla.kernel.org/show_bug.cgi?id=91601">https://bugzilla.kernel.org/show_bug.cgi?id=91601</a> at
request of Rodrigo Vivi]
A new Lenovo Helix 2 laptop we have isn't working correctly, the Intel
Broadwell-U chipset isn't detected by the kernel so DRM (and then X) isn't
using it.
I am running Debian Jessie with a 3.18 kernel.
Relevent lspci output:
00:02.0 VGA compatible controller [0300]: Intel Corporation Broadwell-U
Integrated Graphics [8086:161e] (rev 08)
To have the system boot I need to set acpi=off (I've tried acpi=ht and various
other settings). If acpi is enabled then the last message displayed is the Grub
messages. With acpi off, I can't use the screen or login remotely.
I expect that acpi is actually the issue, as if I try to manually insert the
i915 module I get this in the dmesg output:
[ 143.242134] i915: Unknown symbol acpi_lid_notifier_register (err 0)
[ 143.244330] i915: Unknown symbol acpi_lid_notifier_unregister (err 0)
[ 143.245648] i915: Unknown symbol acpi_lid_open (err 0)
The laptop is running firmware v1.42 released 2015/01/15.
Full dmesg out (with drm.debug=0xe) and Xorg.0.log is attached.
If there is any further info I can gather please let me know.</pre>
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