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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [i915 KMS] No screen image after modeset on Intel Atom x5-Z8300"
href="https://bugs.freedesktop.org/show_bug.cgi?id=109760">109760</a>
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<tr>
<th>Summary</th>
<td>[i915 KMS] No screen image after modeset on Intel Atom x5-Z8300
</td>
</tr>
<tr>
<th>Product</th>
<td>DRI
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</td>
</tr>
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<th>Hardware</th>
<td>x86-64 (AMD64)
</td>
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<th>OS</th>
<td>Linux (All)
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<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>git@zvezd.in
</td>
</tr>
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<th>QA Contact</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>CC</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=143448" name="attach_143448" title="Dmesg on a boot demonstrating the issue">attachment 143448</a> <a href="attachment.cgi?id=143448&action=edit" title="Dmesg on a boot demonstrating the issue">[details]</a></span>
Dmesg on a boot demonstrating the issue
Bug description:
I've got an Acer Switch 10e SW3-016 tablet (Intel Atom x5-Z8300) and have been
fighting in getting a working Linux environment on it for the last couple of
months.
Most notably, booting any distro displays the kernel log until KMS loads Intel
drivers, after which the screen briefly flashes white and stops displaying an
image. I can ssh, successfully start and interact with X, change brightness
levels (and since it's an LCD display I can see brightness changes), just that
all I see is black pixels.
Kernel parameter i915.fastboot=1 temporarily fixes this issue - the display
works, until the screen is shut off (to either sleep or manually "xset dpms
force off"). After the screen wakes up, there is again no screen image
(brightness and everything else works as normal).
I tried manually compiling and installing the recommended drm-tip, but the
issue stays the same.
I've attached the full dmesg (with drm.debug=0x1e log_buf_len=1M kernel
params), and an intel_reg dump.
I couldn't dump the VBIOS:
cat: /sys/devices/pci0000:00/0000:00:02.0/rom: Input/output error
System environment:
-- chipset:
-- system architecture: 64-bit
-- xf86-video-intel: N/A
-- xserver: N/A
-- mesa: N/A
-- libdrm: 2.4.97
-- kernel: 4.20.11-arch2-1-ARCH
-- Linux distribution: Arch
-- Machine or mobo model: Acer Switch SW3-016
-- Display connector: DSI
Reproducing steps:
Additional info:</pre>
</div>
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