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<base href="https://bugs.freedesktop.org/">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Blank screen when starting KMS on a GTX970 for kernel 4.6 series"
href="https://bugs.freedesktop.org/show_bug.cgi?id=97066">97066</a>
</td>
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<th>Summary</th>
<td>Blank screen when starting KMS on a GTX970 for kernel 4.6 series
</td>
</tr>
<tr>
<th>Product</th>
<td>xorg
</td>
</tr>
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<th>Version</th>
<td>unspecified
</td>
</tr>
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<th>Hardware</th>
<td>x86-64 (AMD64)
</td>
</tr>
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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>normal
</td>
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<th>Priority</th>
<td>medium
</td>
</tr>
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<th>Component</th>
<td>Driver/nouveau
</td>
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<th>Assignee</th>
<td>nouveau@lists.freedesktop.org
</td>
</tr>
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<th>Reporter</th>
<td>pil.smmilut@yandex.com
</td>
</tr>
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<th>QA Contact</th>
<td>xorg-team@lists.x.org
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=125292" name="attach_125292" title="full dmesg when experiencing the bug, and with drm.debug=14 log_buf_len=16M">attachment 125292</a> <a href="attachment.cgi?id=125292&action=edit" title="full dmesg when experiencing the bug, and with drm.debug=14 log_buf_len=16M">[details]</a></span>
full dmesg when experiencing the bug, and with drm.debug=14 log_buf_len=16M
Hello,
Since i upgraded my kernel from 4.5.4 to 4.6.3, the screen goes "blank" when
entering KMS, instead of giving the high resolution tty.
By "blank", i mean it has a uniform colour : during some boots it's pure red,
other boots it's pure magenta, and sometimes pure white.
The system is functional and i am able to ssh remotely into the machine.
My setup :
- single 2560x1440 monitor
- NVIDIA Corporation GM204 [GeForce GTX 970] (rev a1) (prog-if 00 [VGA
controller])
- both DVI and DisplayPort ports exhibit the issue
- Arch Linux
If i disable modesetting, i am able to see an image on the screen (low
resolution tty) and login to the system (no Xorg though, as expected).
I found <a class="bz_bug_link
bz_status_NEW "
title="NEW - Latest 4.6rc4 kernel, no booting on gtx970"
href="show_bug.cgi?id=94990">bug 94990</a> which seems similar, although the symptoms are a bit
different (his monitor goes to sleep, mine remains ON and monochromatic). Also,
i have a similar motherboard (Z97-A).
So i tried one advice i saw there : booting with nouveau.config=NvForcePost=1
got me no signal instead of a uniform colour.
Sorry if i'm actually posting a duplicate, i'm not very experienced with this
:) I'll try provide more info if i can.</pre>
</div>
</p>
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