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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Acer V3-772G screen brightness cannot be adjusted with i915.fastboot enabled"
href="https://bugs.freedesktop.org/show_bug.cgi?id=108225">108225</a>
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<th>Summary</th>
<td>Acer V3-772G screen brightness cannot be adjusted with i915.fastboot enabled
</td>
</tr>
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<th>Product</th>
<td>DRI
</td>
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<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>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>normal
</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>ericbasil.rabi@gmail.com
</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
</td>
</tr></table>
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<pre>Created <span class=""><a href="attachment.cgi?id=141889" name="attach_141889" title="dmesg with no fastboot and with fastboot using drm.debug=0x1e">attachment 141889</a> <a href="attachment.cgi?id=141889&action=edit" title="dmesg with no fastboot and with fastboot using drm.debug=0x1e">[details]</a></span>
dmesg with no fastboot and with fastboot using drm.debug=0x1e
When booting with the option i915.fastboot=1 in command line, the screen
brightness of Acer V3-772G laptop cannot be adjusted. When fastboot option is
removed, the screen brightness can be adjusted without issues.
Distro: Fedora 29
`uname -r`
4.18.11-301.fc29.x86_64
# dmidecode 3.2
Getting SMBIOS data from sysfs.
SMBIOS 2.7 present.
Handle 0x0002, DMI type 2, 16 bytes
Base Board Information
Manufacturer: Acer
Product Name: VA70_HW
Version: Type2 - Board Version
Serial Number: NBM8S11001411026447200
Asset Tag: Type2 - Board Asset Tag
Features:
Board is a hosting board
Board is replaceable
Location In Chassis: Type2 - Board Chassis Location
Chassis Handle: 0x0003
Type: Motherboard
Contained Object Handles: 0
`ls /sys/class/backlight` output for both fastboot enabled and disabled:
intel_backlight</pre>
</div>
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