I noticed this bug on an Lenovo Ideapad S340-14API. The system runs Mint
20.2 with Kernel 5.4.0.89, but I upgraded, because I had the problem
with the previous Mint version as well. Plugging in power supply lets
the system boot into graphics mode. It also helps to boot into the
rescue mode via
Add an Acer Aspire 5 Laptop
(https://www.amazon.com/gp/product/B07RF1XD36) to the list of problem
platforms.
The machine was just upgraded to Linux Mint 20.2. Mint 20.1 was OK.
Linux Mint 20 is based on Ubuntu 20.04 LTS.
-
$ dmesg | grep -i error
[0.755376] RAS: Correctable Errors
Addition to #38. 20.10, it is booting on a fresh install to black
screen. The workaround is not fixing that (alone), the solution was
install all updates. But it is kind off difficult on terminal with no
ethernet, no wifi driver + config ... I hope the next release will solve
that issue.
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I installed 20.10, the workaround from #20 not working, it boots into
black screen any time. Checked grup params, "quiet splash iommu=soft" is
aligned as described.
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The workaround in #20 is working for me too.
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https://bugs.launchpad.net/bugs/1870971
Title:
[amdgpu] (X)ubuntu 20.04 boots to black screen on Lenovo Ideapad
L340-17API
I can confirm this bug on HP 15s-eq0355ng with Ryzen 5 3500U.
Fresh install from xubuntu 20.04.1 iso with all updates (kernel
5.4.0-59).
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FWIW, I am running xubuntu 20.04.1 on a Lenovo e495 with Ryzen 7 and
Vega 8. Based on discussions like this I opted to install the 5.6 OEM
kernel from the standard repositories for some tests. I have not had any
issues in this context since then and plan to stick with it. It works
standalone, on
After a few restarts, upon successful login (again without the battery charger
inserted) the message indicating a problem found on /usr/bin/gdm3 appeared.
These are some data of the report.
I hope it will help resolve the bug soon.
package:
gdm3.3.34.1-1ubuntu1
problemType:
crash
title:
It occurs also on my new Lenovo thinkpad e495 with Ubuntu 20.04 fresh install,
only when it boot without the power plugged in.
In that case the CTRL+ALT+F* doesn't work.
To restart I suggest to use REISUB command instead of pressing the power button
;)
https://it.wikipedia.org/wiki/Magic_Sys_Req
I had difficulties installing Kernel 5.8-rc3. But I tested 5.8.1:
https://kernel.ubuntu.com/~kernel-ppa/mainline/v5.8.1/
Lenovo Ideapad L340-17API (81LY000KGE): No black screen in 6 attempts.
The notebook also booted much faster. Before, there had always been a
kind of "pause", during which it
... further to # 30: it would have been nice, but actually the Lenovo
Ideapad L340-17API (81LY000KGE) still occasionally gets a "black
screen". Weird: after numerous positive attempts (something like 10),
the odd boot goes to black screen. Then a "series" of black screens
seems to start.
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I have experienced the problem with the black screen in battery mode in
all my (fairly new) AMD notebooks (bought this year; all AMD Ryzen 5
3500U), running Kubuntu 20.04. As of today the status is as follows:
- Lenovo Ideapad L340-17API (81LY000KGE) (possibly identical to the one
in #21). Kernel
I'm also affected by this bug on a Lenovo X395 and can confirm the
workaround in #20 works.
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https://bugs.launchpad.net/bugs/1870971
Title:
[amdgpu] (X)ubuntu 20.04 boots
Using iommu=soft workaround is working.
Just tested latest mainline kernel https://kernel.ubuntu.com/~kernel-
ppa/mainline/v5.8.1/ without iommu=soft seems to work for my Acer Swift
3 with 3500u.
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Same here on Ubuntu Mate 20.04. We have 50 laptops Lenovo V155-15API
Ryzen 3 3500u unable to start in battery mode.
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https://bugs.launchpad.net/bugs/1870971
Title:
I've installed https://kernel.ubuntu.com/~kernel-ppa/mainline/v5.8-rc3/
and the problem seems to have been solved. My laptop is a HP-Pavilion-
Laptop-15-cw1xxx, CPU: AMD Ryzen 5 3500U with Radeon Vega Mobile Gfx.
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@franzheinz: I didn't notice any negative side effects with the
workaround in #20.
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https://bugs.launchpad.net/bugs/1870971
Title:
[amdgpu] (X)ubuntu 20.04 boots to black
Please test latest mainline kernel:
https://kernel.ubuntu.com/~kernel-ppa/mainline/v5.8-rc3/
If mainline kernel doesn't work, please file an upstream bug at
https://gitlab.freedesktop.org/drm/amd/issues
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@Katan Maier (katastic): Did you encounter any problems with the GRUB
configuration mentioned in post #20?
And does this fix the problems with VLC, too?
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VDPAU is only useful if you have a NVIDIA GPU.
** Changed in: vlc (Ubuntu)
Status: New => Invalid
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https://bugs.launchpad.net/bugs/1870971
Title:
[amdgpu]
** Summary changed:
- [amdgpu] (X)ubuntu 20.04 boots to black screen on Lenovo Ideapad L340-17API
+ [amdgpu] (X)ubuntu 20.04 boots to black screen on Lenovo Ideapad L340-17API
when in battery mode
** Tags added: battery
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