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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 - booting gives black screen [drm:intel_dp_start_link_train] [CONNECTOR:67:eDP-1] Link Training failed at link rate = 162000, lane count = 2"
href="https://bugs.freedesktop.org/show_bug.cgi?id=109398">109398</a>
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<th>Summary</th>
<td>booting gives black screen [drm:intel_dp_start_link_train] [CONNECTOR:67:eDP-1] Link Training failed at link rate = 162000, lane count = 2
</td>
</tr>
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<th>Product</th>
<td>DRI
</td>
</tr>
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<th>Version</th>
<td>DRI git
</td>
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<th>Hardware</th>
<td>x86-64 (AMD64)
</td>
</tr>
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<th>OS</th>
<td>Linux (All)
</td>
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<th>Status</th>
<td>NEW
</td>
</tr>
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<th>Severity</th>
<td>blocker
</td>
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<th>Priority</th>
<td>medium
</td>
</tr>
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<th>Component</th>
<td>DRM/Intel
</td>
</tr>
<tr>
<th>Assignee</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
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<th>Reporter</th>
<td>seppe.hoogzaad@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>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=143169" name="attach_143169" title="log files and computer information">attachment 143169</a> <a href="attachment.cgi?id=143169&action=edit" title="log files and computer information">[details]</a></span>
log files and computer information
Booting gives black screen with flickering. No recovery possible.
I am using the 5.0.0-rc2 kernel from:
<span class="quote">> git clone git://anongit.freedesktop.org/drm-tip</span >
I have incuded a WiFi driver and btrfs to the .config made with "make
defconfig".
I have used the "splash=silent quiet showopts drm.debug=0xe log_buf_len=4M"
kernel parameter to boot. The kernel boots into a flashing screen and the
computer can not be used. No image is visable. Text terminals (ctrl-alt-F1)
are also not visable. The flickering is mostly at the bottem of the screen,
once every two seconds (or something like that time).
The exact proces is the following:
- grub loads
- the kernel boots
- screen goes black, start flashing. White flashes about every second.
- the Opensuse tumblewheet logo appears which shows motion
- screen goes black with small flashes of white at the bottem of the screen.
This behavior is not present when running the opensuse leap 15.0 kernel :
kernel-default-4.12.14-lp150.11.4.x86_64.rpm
<a href="http://download.opensuse.org/distribution/leap/15.0/repo/oss/x86_64/kernel-default-4.12.14-lp150.11.4.x86_64.rpm.mirrorlist">http://download.opensuse.org/distribution/leap/15.0/repo/oss/x86_64/kernel-default-4.12.14-lp150.11.4.x86_64.rpm.mirrorlist</a>
I also made a commend about this bug at
<a href="https://bugzilla.suse.com/show_bug.cgi?id=1119621#c15">https://bugzilla.suse.com/show_bug.cgi?id=1119621#c15</a>
Since i have tested it on the drm-tip kernel, i have reported the (same?) bug
here.
Note that the hardware i am using is a chromebook (Dell). The firmware is
having bugs, which i can not solve. This can also interfere here.
In the logs is a file i made after the next (normal) boot:
# sudo journalctl --boot=-1 > journalctl_boot.txt
I could not make contact with the machine remotely, since wifi did not came
up. I therefore could only make a log afterwards. Additional log files are
therefore not included.
In the 'journalctl_boot.txt' i see the following line repeatetly:
[drm:intel_dp_start_link_train] [CONNECTOR:67:eDP-1] Link Training failed at
link rate = 162000, lane count = 2
This with a whole lot of other lines. There is no clear error or warning in
the log.
Included is also a file "dmesg_before.txt". This is from a boot when
additionaly
the "i915.fastboot=1" kernel parameter is set. Then the computer boots
correct. This file is the same as the file included in an other
bug-report. There the command "xset dpms force off" triggers the same
state. The file "dmesg_before.txt" is from before that command is given, thus
is from a normal running state.
Also includes are the machine info and lspci info, made when the machine is
running with the "i915.fastboot=1" kernel parameter set.
<span class="quote">> inxi -bxx</span >
System: Host: linux-6axq Kernel: 5.0.0-rc2test-g1fb7b31e074e x86_64 bits: 64
compiler: gcc v: 8.2.1 Console: N/A
dm: LightDM Distro: openSUSE Tumbleweed 20190115
Machine: Type: Desktop System: GOOGLE product: Lulu v: Pilot serial:
123456789 Chassis: type: 3 serial: N/A
Mobo: N/A model: N/A serial: N/A BIOS: coreboot v: N/A date:
03/28/2016
Battery: ID-1: BAT0 charge: 41.2 Wh condition: 70.1/67.0 Wh (105%) volts:
11.6/11.4 model: SMP-LIS DELL MJ serial: 0340
status: Discharging
CPU: Dual Core: Intel Core i3-5005U type: MT MCP arch: Broadwell speed:
1743 MHz min/max: 500/2000 MHz
Graphics: Device-1: Intel HD Graphics 5500 driver: i915 v: kernel bus ID:
00:02.0 chip ID: 8086:1616
Display: server: X.org 1.20.3 driver: intel tty: 180x31
Message: Advanced graphics data unavailable in console for root.
Network: Device-1: Intel Wireless 7260 driver: iwlwifi v: kernel port: 1840
bus ID: 01:00.0 chip ID: 8086:08b1
Drives: Local Storage: total: 111.79 GiB used: 71.60 GiB (64.0%)
Info: Processes: 189 Uptime: N/A Memory: 3.78 GiB used: 410.2 MiB (10.6%)
Init: systemd v: 239 runlevel: 5
target: graphical.target Compilers: gcc: 8.2.1 alt: 8 Shell:
dump-info-befor inxi: 3.0.29</pre>
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