After many months, I had the opportunity to put my hands on the computer that
had these audio problems:
(https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1864871/comments/31)
...and now the audio works without any workaround.
Current Ubuntu version: 20.04.2
Kernel: 5.8.0-41
--
You
Similar problem with:
- Ubuntu 20.04 LTS
- Fujitsu LifeBook A530
- $ lspci | grep Audio
00:1b.0 Audio device: Intel Corporation 5 Series/3400 Series Chipset High
Definition Audio (rev 05)
THE PROBLEM:
No sound. Gnome audio system settings shows "Dummy Audio" as output device.
Trying with
Hi,
Another main problem is that the *buntu 17.10 ISO images are still
down-loadable. Not all the users read linux news and are aware of this bad bug.
Unfortunately a warning on the ubuntu.com download page is not enough. There
are infinite ways to reach the download links of the 17.10.
Also,
Before performing the reverse bisect process I thought to ask directly
in the linux-acpi mailing list which was the patch (or the set of
patches) that have fixed the acpi/backlight issue .
This is the answer:
(original message http://marc.info/?l=linux-acpim=140429106012604w=2)
Hi Christopher,
in the last couple of days I tried the kernels I didn't try before and now I
can tell for sure that the fix arrived with the v3.16rc1 kernel. I also had a
look at the bisect documentation and tried to move my first steps.
In the meantime Aaron Lu, the guy that was looking after
Some good news.
I've tried the upstream kernel 3.16-rc2 and the brightness shortcut
Fn+F6/Fn+F7 is now working out of the box without any workaround.
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Right, this should be OK http://marc.info/?l=linux-
acpim=140178030214298w=2
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https://bugs.launchpad.net/bugs/1318299
Title:
[Fujitsu Lifebook A512] Brightness hot keys
** Attachment added: acpidump.txt
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1318299/+attachment/4124592/+files/acpidump.txt
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@Christopher
Here the bug report on the Linux mailing list:
http://lkml.iu.edu//hypermail/linux/kernel/1406.0/00478.html
hope it's OK.
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** Tags added: kernel-bug-exists-upstream kernel-bug-exists-
upstream-3.15-rc7
** Changed in: linux (Ubuntu)
Status: Incomplete = Confirmed
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Hi Christopher,
Tried the 3.15-rc7 kernel but the problem is still there. Pressing
Fn+F6/Fn+F7 the brightness doesn't change.
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https://bugs.launchpad.net/bugs/1318299
Public bug reported:
(Fujitsu Lifebook A512 - Ubuntu 14.04 - Linux 3.13.0-24-generic x86_64)
Pressing Fn+F6 or Fn+F7 the brightness doesn't change.
WORKAROUND (found here http://ubuntuforums.org/showthread.php?t=2192471)
1) The command:
for i in /sys/class/backlight/*; do echo $i;cat
Here the new bug related to Fujitsu Lifebook A512:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1318299
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https://bugs.launchpad.net/bugs/1249219
Title:
8086:0116
** Description changed:
(Fujitsu Lifebook A512 - Ubuntu 14.04 - Linux 3.13.0-24-generic x86_64)
Pressing Fn+F6 or Fn+F7 the brightness doesn't change.
-
WORKAROUND (found here http://ubuntuforums.org/showthread.php?t=2192471)
1) The command:
for i in /sys/class/backlight/*;
On my Fujitsu Lifebook A512 I should be able to adjust the brightness
pressing Fn+F6 or Fn+F7. The brightness-indicator pop-up works but the
brightness doesn't change. This should be related to the cpi_video0 /
intel_backlight issue.
I found a workaround here
At this stage a backport would make sense only to Ubuntu 12.04 LTS which is
going to be supported till 2017. I don't use it but of course a backport could
be useful for other people who are using the 12.04 and planned to use it til
the EOL.
I think it's up to the developers to take a decision.
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