Hi @kaihengfeng,
I am not familiar with kernel/git bisection and was unable to do what
you asked, partly because I couldn't boot into linux/ubuntu to begin
with, and updating the kernel from 19.10 wouldn't test all the other
services that could be at play.
However, after repeated efforts or
Confirming headphones work with 5.7.x kernel, board name: NP930MBE-
K04US.
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https://bugs.launchpad.net/bugs/1834566
Title:
Samsung Notebook 9 Pro - Internal Speaker Playback problem -
Older version Live USBs work. I am currently running on a Live Backup
19.10 to write this. I am only having an issue with 20.04.
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https://bugs.launchpad.net/bugs/1878726
Title:
Live
Live USB fails to boot or provide command line for submitting log file.
I am attaching a video (excuse the poor quality) that captures the load
sequence. Hopefully this is insightful enough for helping to
troubleshoot.
** Attachment added: "Loading screen capture"
@kaihengfeng, not sure how to capture dmesg, as the boot process never
completes preventing me from accessing a command line. Also, I am
unable to switch to another TTY session. Can you please provide guidance
or direct me to a article that explains how to capture the log?
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I tried booting in safe graphics mode. It gets stuck in an endless
loop:
watchdog: BUG: soft lockup - CPU#0 stuck for 23s! [kworker/u8:3:194]
rcu: INFO: rcu_sched self-detected stall on CPU
rcu: $0-...: (14999 ticks this GP) idle=736/1/0x4002
softirq=5356/5356 fqs=7398
[FAILED]
I created a live USB of my system using systemback before trying to
upgrade from 19.10 to 20.04. My live USB backup works fine. I tried a
Fedora 31 live USB and it works fine. I also used different methods to
create the 20.04 Live USB thinking it might have been a corrupt iso. I
tested the
Unable to load kernel to generate log file.
** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
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https://bugs.launchpad.net/bugs/1878726
Title:
Live USB Installer not
Public bug reported:
Live USB made from ubuntu-20.04-desktop-amd64 fails to boot. System
hangs with watchdog: BUG: soft lockup - CPU# and rcu: INFO: rcu_sched
self-detected stall on CPU.
System specs:
Intel(R) i7-7500U running AMD discrete graphics
Have tested the Live USB on other systems
Should have provided the links for reference:
https://bugzilla.kernel.org/show_bug.cgi?id=203443
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1826645
Appears to work on 4.19.9 kernel when recompiled with patches:
Just upgraded to kernel 5.3.0.29-generic and still no sound.
Found a user who compiled his kernel with ALC294 patch and seems to have
gotten his sound working.
His system is the ASUS UX362FA, running Realtek ALC298 (Device: pci
0x9dc8).
Details can be found here: Kernel.org Bugzilla – Bug
Public bug reported:
Unable to get system speakers working running 19.04. At max volume,
sound is barely perceptible through headphones. Pavucontrol shows
sounds is present, but no amount of adjustments makes a difference.
ProblemType: Bug
DistroRelease: Ubuntu 19.04
Package: alsa-base
Public bug reported:
Trying to troubleshoot a resume from suspend issue. Possible solution
could be TPM driver related. I was trying to install TPM-tools in hopes
it would enable the appropriate kernel module. Failed to install
trousers.
ProblemType: Package
DistroRelease: Ubuntu 18.04
This was a fresh install of Ubuntu Mate 18.04.
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https://bugs.launchpad.net/bugs/1773705
Title:
package trousers 0.3.14+fixed1-1build1 failed to install/upgrade:
installed trousers
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