The Problem still seems not to have been solved with the current kernel
under Ubuntu 20.04. LTS
** Also affects: vlc (Ubuntu)
Importance: Undecided
Status: New
** Summary changed:
- [amdgpu] Xubuntu 20.04 boots to black screen on Lenovo Ideapad L340-17API
+ [amdgpu] (X)ubuntu 20.04
@alexander-s-m:
On a fresh install without any workarounds using VLC with the setting
"Hardware-accelerated decoding" set to "VDPAU video decoder" (under Tools ->
(Simple) Preferences -> Input/Codec) I experience the same low video quality on
HDTV (H.264) video channels you are writing about.
@katastic Interestingly I've also noticed video output problems in VLC
on my Lenovo Ideapad L340-17API.
In my case video is present in VLC but quality is quite poor, video
looks interlaced even though it is not.
Workaround: reconfigure VLC to use another video output module and probably
restart
Lenovo Ideapad S540-14API Ubuntu Mate 20.04 user here:
Same bug affects me very much. Black screen on boot, probably only when on
battery-only during boot.
The workaround mentioned in #3 works for me, but the battery runtime is halved.
The workaround in #5 has the effect of no video during vlc
** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
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Title:
[amdgpu] Xubuntu 20.04 boots to black screen on Lenovo Ideapad
Hello dears - me too:
it is a ASUS with Ryzen and Kubuntu LTS 20.04 - It happens from my point of
view only with battary power.
May be it is related to also happen
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1873325 with missing
firmware, that also not can found in git repo for Linux
NOT fixed in 5.4.0; it just recurred here on cold start from battery
power.
OS: Ubuntu 20.04 focal
Kernel: x86_64 Linux 5.4.0-37-generic
Uptime: 17m
Packages: 2908
Shell: bash 5.0.16
Resolution: 5360x1440
DE: GNOME 3.36.2
WM: BudgieWM
WM Theme: Pocillo
GTK Theme: Pocillo-dark [GTK2/3]
At the time of my first comment, and the occurrences, the kernel
installed was 5.4.0.33.38 on Ubuntu. On Jun 10 this was updated to
5.4.0.37.40 and so far I did not observe any recurrence. Note however
that the effect was intermittent. If it does not recur until end of the
month I guess it can be
https://bugzilla.kernel.org/show_bug.cgi?id=205089
It seems this should have been fixed in vanilla kernel v5.4.35, which
maps to Ubuntu kernel 5.4.0-34. So could you have a try on the latest
kernel?
** Bug watch added: Linux Kernel Bug Tracker #205089
Alexander´s solution worked just fine.
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Title:
[amdgpu] Xubuntu 20.04 boots to black screen on Lenovo Ideapad
L340-17API
To manage
This problem also occurs in my HP-CW1011la laptop (Ryzen 3500u) while
trying to boot on battery. Iĺl try Alexander´s workaround.
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Title:
Can confirm that the problem occurs on my "Lenovo IdeaPad L340-17API"
regularly when power isn't plugged in.
On some occasions I got a corrupted root filesystem as a consequence of having
to turn the system off "hard".
Furthermore I noticed that sometimes the Power-LED began to blink instead of
Seen on ThinkPad E495. Updated BIOS to 1.16 -- good but did NOT solve
this particular issue. Still getting the boot-to-black issue on battery
power, on a random basis.
Attempting the workaround from Alexander in #3 and #5.
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I have exactly the same on lenovo ideapad S340 on AMD
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Title:
[amdgpu] Xubuntu 20.04 boots to black screen on Lenovo Ideapad
L340-17API
To
I have the same issue on a Thinkpad X395: with power plugged in,
everything boots fine. However, on battery it will only boot to a black
screen once the display manager is started.
Plugging the power in, booting up and unplugging the power once the
login-screen appears does work, however. Also,
Apologies, this only occurs from me when I don't have the POWER plugged
in. If I am on just battery it will just boot to a black screen, but
when plugged in to the charger it boots up just fine.
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I am also experiencing this same issue on an Acer Aspire Slim 5. I
installed Ubuntu 20.04 server edition and then Mate-desktop on top of
that. It seems that I only experience this issue when I do not have
ethernet plugged in. With ethernet plugged in the system boots just fine
into the window
I noticed that after boot with badly initialized GPU idle power
consumption is 2-2.5 higher than after normal boots.
But this can be fixed by putting laptop to suspend and waking it.
Therefore I've extended my workaround from #3 to this:
[Service]
Type=oneshot
ExecCondition=/bin/sh -c
Ha, that's a great hack and not something you should need to do. But
great hack.
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Title:
[amdgpu] Xubuntu 20.04 boots to black screen on Lenovo
This issue is not 100% reproducible. It happens after 50% of reboots and
I can't figure out regularity.
But I managed to contrive a workaround!
```
$ cat /etc/systemd/system/fix-graphics-after-boot.service
[Unit]
Description=Restart display-manager if amdgpu initialization failed
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