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<body><span class="vcard"><a class="email" href="mailto:zeng.shixin@gmail.com" title="zeng.shixin@gmail.com">zeng.shixin@gmail.com</a>
</span> changed
<a class="bz_bug_link
bz_status_REOPENED "
title="REOPENED - [byt dsi] No image on WinBook TW700 tablet's DSI display after DRM initializes"
href="https://bugs.freedesktop.org/show_bug.cgi?id=89704">bug 89704</a>
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<tr>
<th>What</th>
<th>Removed</th>
<th>Added</th>
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<td style="text-align:right;">Status</td>
<td>RESOLVED
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<td>REOPENED
</td>
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<td style="text-align:right;">Resolution</td>
<td>FIXED
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<td>---
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<b><a class="bz_bug_link
bz_status_REOPENED "
title="REOPENED - [byt dsi] No image on WinBook TW700 tablet's DSI display after DRM initializes"
href="https://bugs.freedesktop.org/show_bug.cgi?id=89704#c25">Comment # 25</a>
on <a class="bz_bug_link
bz_status_REOPENED "
title="REOPENED - [byt dsi] No image on WinBook TW700 tablet's DSI display after DRM initializes"
href="https://bugs.freedesktop.org/show_bug.cgi?id=89704">bug 89704</a>
from <span class="vcard"><a class="email" href="mailto:zeng.shixin@gmail.com" title="zeng.shixin@gmail.com">zeng.shixin@gmail.com</a>
</span></b>
<pre>Problem still exists with 4.5.1.
>From the kernel log, I see a line:
Feb 19 02:52:00 winbook7 kernel: [drm:pwm_setup_backlight [i915]] *ERROR*
Failed to own the pwm chip
which is mentioned in bug report
<a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - [BYT DSI PMIC backlight] Backlight support for Dell Venue 8 Pro"
href="show_bug.cgi?id=85977">https://bugs.freedesktop.org/show_bug.cgi?id=85977</a>
I also tried to blacklist i915 when the system boots up and then to manually
load the module to avoid the timing issue that PWM might come after i915 is
loaded, but to no vail.</pre>
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