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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 - Unable to correctly set 3 monitor outputs with different resolution/clock on newer kernel/intel driver"
href="https://bugs.freedesktop.org/show_bug.cgi?id=91900">91900</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>Unable to correctly set 3 monitor outputs with different resolution/clock on newer kernel/intel driver
</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 (IA32)
</td>
</tr>
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<th>OS</th>
<td>Linux (All)
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>major
</td>
</tr>
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<th>Priority</th>
<td>medium
</td>
</tr>
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<th>Component</th>
<td>DRM/Intel
</td>
</tr>
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<th>Assignee</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>maurizio.berti@gmail.com
</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>
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<div>
<pre>Created <span class=""><a href="attachment.cgi?id=118113" name="attach_118113" title="Xorg.0.log (separated with marks)">attachment 118113</a> <a href="attachment.cgi?id=118113&action=edit" title="Xorg.0.log (separated with marks)">[details]</a></span>
Xorg.0.log (separated with marks)
This setup used to work with xf86-video-intel version 2.21.15 and kernel
3.10.7:
VGA1: analog output to 1280x1024 - VGA connector
HDMI1: digital output to 1440x900 - DVI connector
HDMI2: digital output to 1280x1024 - HDMI connector
from left to right, total screen size: 4000x1024
Using the same kernel with driver 2.99.917 it is possible by manually and
respectively setting the resolution of HDMI1 to 1280x960, 1280x1024 and finally
1440x900 like this:
xrandr --output HDMI1 --off
xrandr --output HDMI2 --off
xrandr --output VGA1 --mode 1280x1024 --primary --output HDMI2 --mode 1280x1024
--right-of VGA1
xrandr --output HDMI1 --mode 1280x960
xrandr --output HDMI1 --mode 1280x1024
xrandr --output HDMI1 --mode 1440x900 --primary --right-of VGA1 --output HDMI2
--mode 1280x1024 --right-of HDMI1
With kernel 4.0.5 (latest stable for my distribution) it's not possible even
with this "workaround".
After talking on #intel-gfx I came up with some test outputs, this is the
sequence of what happens (with intel-2.99.917 and kernel-4.0.5) for the logs
I'll attach later, they are numbered according to the file name suffix:
00 - boot:
outputs of boot after login shell
0 - startup, no xrandr commands:
VGA1 ok (1280x1024)
HDMI1 clone of VGA1 - correct resolution (1440x900)
HDMI2 off
actual screen size: 1440x1024
1 - run working xrandr script (sequence reported above)
VGA1 ok
HDMI1 clone of VGA1 (1280x1024)
HDMI2 right of VGA1/HDMI1 (1280x1024)
2 - noscreen: disabling everything
nothing
3 - vga1 only
VGA1 ok
HDMI1/2 off
4 - resetting
VGA1 ok
HDMI1 clone of VGA1
HDMI2 ok (1280x1024) but at right of "ghost" HDMI1, x offset
1280(VGA1)+1440(HDMI1)
The command for "resetting" was:
xrandr --output VGA1 --crtc 2 --mode 1280x1024 --refresh 60 --left-of HDMI1
--output HDMI1 --crtc 0 --mode 1440x900 --refresh 60 --output HDMI2 --crtc 1
--mode 1280x1024 --refresh 60 --right-of HDMI1
System info:
i686 architecture
kernels 3.10.7-gentoo-r1 (working with workaround) and 4.0.5-gentoo
Gentoo Linux
i5-3570K CPU @ 3.40GHz
ASUS P8Z77-V LX
Attaching the Xorg log (for kernel 4) with 3 separation asterisks and
description to mark the different points.</pre>
</div>
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