Public bug reported:
I've upgraded to 18.04. Since then, it's impossible to use thumb-drives.
If I try, on the first write operation, that operation hangs. Trying to
issue a 'sync' command that hangs too. After a while (some minutes or
so?) I see the following in kernel log / dmesg (see later). It
[22596.884250] sysrq: SysRq : This sysrq operation is disabled.
I got this, if I try to trigger those sysreq events by echoing t/m into
that procfs file. I'm anyway curious how sysreq stuffs can be
enabled/disabled, since I seldom use ALT-SYSREQ- combos as well, and
many of them just reports t
Ok, I will investigate as soon as I have time. By the way, I am
wondering if using BFQ as I/O scheduler can be the problem, ie:
# cat /etc/udev/rules.d/60-schedulers.rules
## set noop scheduler for non-rotating disks
ACTION=="add|change", KERNEL=="sd[a-z]", ATTR{queue/rotational}=="0",
ATTR{queu
Removing the scsi_mod.use_blk_mq=1 from /etc/default/grub and the
mentioned udev rule file, and regenerating initial ramdisk + reboot
seems to do the trick, now everything works with default (cfq) I/O
scheduler.
Before this comment, and the problem:
# cat /sys/block/sda/queue/scheduler
[bfq] non
I have Lenovo L580. And a similar issue. The install image written to
the USB drive worked fine, but after installation touchpad simply did
not work. I've tried everything suggested (utilizing some google
searches ...), including kernel parameters, blacklisting various i2c hid
modules, and all the
@Kai-Heng Feng : Wow, it fixed the issue for me at least, on Lenovo
Thinkpad L580. :) :)
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https://bugs.launchpad.net/bugs/1803600
Title:
Elantech - Touchpad not working aft
Lenovo ThinkPad L580:
$ cat /sys/bus/serio/devices/serio1/firmware_id
PNP: LEN2037 PNP0f13
$ dmesg | fgrep -i elan
[0.00] Command line: BOOT_IMAGE=/boot/vmlinuz-4.18.0-11-generic
root=UUID=8ee3c188-2063-45de-b270-2db3df928e18 ro psmouse.elantech_smbus=0
quiet splash vt.handoff=1
[0.
Public bug reported:
After a "usual" upgrade, my system did not give any sign of life on the
monitor. I tried to boot an older kernel, it worked. Then I discovered,
that the problem that nvidia drivers cannot be built against kernel
linux-image-5.4.0-42-generic, which could be the problem.
from /
It seems update 435.21-0ubuntu0.18.04.3 of nvidia-kernel-source-435
fixed the problem for me, at least!
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https://bugs.launchpad.net/bugs/1888617
Title:
Same problem with powerdns, I can't run it with apparmor profile,
because it complains:
operation="sendmsg" info="Failed name lookup - disconnected path"
error=-13 profile="/usr/sbin/pdns_server" name="run/systemd/journal/dev-
log" pid=17236 comm="pdns_server" requested_mask="w" denied_mask="w"
fs
Public bug reported:
Ubuntu 16.04 on 64 bit produces hissing sound (just by my - far from
being 'musical' - ear, it sounds like a sinus wave with frequency about
1KHz or so) on headphones. Interestingly, after boot this does not
happen and usually can be hear only after the first application which
Quite odd ... But it seems there is sometimes a louder hissing sound,
but the other one is more frequent issue: a not so loud but annoying
one. This second _seems_ to be cause (I have no idea about the reason!!)
by an XBox 360 controller. If it's plugged to the USB port, the sound
can be heard in s
$ uname -a
Linux oxygene 4.8.0-040800-generic #201610022031 SMP Mon Oct 3 00:32:57 UTC
2016 x86_64 x86_64 x86_64 GNU/Linux
The really same. Moreover, this hissing sound can be heard with BIOS/etc
too, without any OS, it's even more louder then.
The issue started with this machine, I didn't have
Sorry about my English, so I meant that I didn't own the machine itself,
so I have no experience just since I use that PC, and it's only two
weeks or so. Also, I've just discovered that the annoying sound is there
even right after switching the machine on, without any OS loaded too.
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** Changed in: linux (Ubuntu)
Status: Incomplete => Opinion
** Changed in: linux (Ubuntu)
Status: Opinion => Confirmed
** Description changed:
Ubuntu 16.04 on 64 bit produces hissing sound (just by my - far from
being 'musical' - ear, it sounds like a sinus wave with frequency
Public bug reported:
I've used aa-logprof to find more things out to be added to my custom
apache2 apparmor file. Since PHP created tons of files in /tmp in the
form of /tmp/php* I've decided to add this:
/tmp/php* rw,
I'm not sure if it caused the problem, but after this
/etc/init.d/apparmor re
I've also attached some files, with full dmesg output, uname -a, lspci,
version info, and the apparmor profile for apache2.
** Attachment added: "Logs"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1615082/+attachment/4724162/+files/bug-info.tgz
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It's a problem that it's a production server, I cannot play too much
with it :-/ It was a freshly installed 16.04LTS according to the
operators who did the install. According to the logs, the problematic
kernel was:
Linux version 4.4.0-34-generic (buildd@lgw01-20) (gcc version 5.3.1
20160413 (Ubun
Public bug reported:
I'm using Nvidia's driver on Ubuntu 22.04.4 without major issues since
about a year (or so) on this DELL Latitude 5531 notebook (01:00.0 3D
controller: NVIDIA Corporation TU117M [GeForce MX550] (rev a1)).
Yesterday, I had an ubuntu update, so I use driver 535 now, the previous
Public bug reported:
I have got a somewhat unstable internet connection since years. So far
it didn't caused extra problems, but since 1-2 days (I cannot tell
exactly) I have a strange and annoying experience. I can even simulate
this 100% by unplugging the ethernet cable and then plugging it back
** Attachment added: "More detailed kernel log about/around the event"
https://bugs.launchpad.net/ubuntu/+source/linux-signed-hwe-6.8/+bug/2076545/+attachment/5804862/+files/kernlog.txt
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** Description changed:
I have got a somewhat unstable internet connection since years. So far
it didn't caused extra problems, but since 1-2 days (I cannot tell
exactly) I have a strange and annoying experience. I can even simulate
this 100% by unplugging the ethernet cable and then plugg
** Attachment added: "gziped full kernel log"
https://bugs.launchpad.net/ubuntu/+source/linux-signed-hwe-6.8/+bug/2076545/+attachment/5804893/+files/kern.log.gz
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** Summary changed:
- kworker consumes 100% and notebook unusable after an ethernet link down and
link up event
+ kworker consumes 100% CPU and machine is unusable after an Ethernet link
down/up event
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