[Bug 101044] [SKL Xeon DP-to-VGA] no hotplug signal from DP-to-VGA branch device after unplug/replug cycle
bugzilla-daemon at freedesktop.org
bugzilla-daemon at freedesktop.org
Thu May 25 03:08:35 UTC 2017
https://bugs.freedesktop.org/show_bug.cgi?id=101044
--- Comment #13 from amy.shih <amy.shih at advantech.com.tw> ---
Hi Sir,
We added the function "intel_dp_sink_dpmspatch" patch on "drm-intel-nightly"
source code & rebuild the kernel, the VGA no signal issue is gone.
We also test the patch on CentOS 7.3.1611 with kernel 3.10.0-514.10.2, the VGA
no signal issue is also gone.
Enclosed dmesg logs are for patch on "drm-intel-nightly" source code.
[patch_dmesg_after_boot_up.log]:
dmesg after booting up the OS with VGA cable connected.
[patch_dmesg_after_pull_out_VGA_cable.log]:
dmesg after pull out VGA cable.
[patch_dmesg_after_pull_in_VGA_cable.log]
dmesg after pull in VGA cable.
Could you explain why we need to add this patch to make VGA work & does this
patch have any side effect?
Thank you!
Amy Shih
Amy.Shih at advantech.com.tw
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