Public bug reported:
[Sorry for not using ubuntu-bug. Selecting “other problem” continues as
if it were “Display”, the option “Display” gives an error; continuing
after “other problem” and “crash”, I end up in a dialog saying “text”]
I have a Lenovo L480, about 1 year old. I originally installed Ubuntu
19.04 as dual boot alongside the pre-installed Windows 10.
>From the start, I had problems with the system freezing at random points.
>Originally, that happened about once a day.
Cursory inspection seemed to suggest that it was gnome-related, so I switched
over to Kubuntu 19.10 (fresh install) to see whether that was indeed the case.
This combination ran fairly stable. Also updating to Kubuntu 20.04 initially
did not change this stability.
In the past few days, though, crashes have reappeared and are becoming more and
more frequent: I had to start typing this message 3 times.
These crashes seem to appear at random (i.e. there is no single program that
causes them, no single interaction or fixed system uptime) but there are
distinguishabe patterns:
1) the system completely freezes at some point (that may be when doing noting,
typing or moving the mouse);
2) one or more processes spike to 100% CPU core usage, keyboard and mouse input
is initially still accepted; these processes often are (but not limited to)
Chrome, Firefox or a Java application. There are sub-patterns:
1) KDE is affected, too, so while I can move the mouse and type in the last
active window, I cannot switch to any other window or interact with the panel;
this curiously is most often the case, when the crash trace in `syslog`
mentions that programme.
2) KDE is slightly affected in that I can switch to other windows and
interact with them but not with the panel (in this case, sometimes I get a
notification of a plasmashell crash).
3) I can open the application launcher and try to reboot; in most cases the
system will hang trying to reboot:
1) The system completely freezes when trying to reboot (at different
stages).
2) It produces some stack traces (at times seemingly in a loop) to
console after exiting X or Wayland.
3) It produces one stack trace, keyboard input is possible but nothing
else happens (i. e. Ctrl-Alt-Fx works but no other keyboard input is accepted).
I have been booting into Windows at several points, e.g. to use the
Lenovo tools to install updates. I have not encountered any crashes or
freezes in Windows. I also ran Lenovo’s system checks (including full
RAM check) which reported no hardware problems.
The incidents are not related to external hardware and can happen with or
without external USB or monitor (any combination) and both on AC and battery.
Also, they have occurred both when conntected to a WiFi, not connected at all
and connected to LAN (did not check whether WiFI was active at that point, too).
The amount of information in `/var/log/syslog` differs heavily. In case
of pattern 1), no error messages immediately before the end of logging
can be found. In case of pattern 2), there may be longer traces, but
occasionally even they get interrupted in the middle (in the attached
syslog, see 2020-06-16T12:33:56).
As these patterns produce different output to syslog and different
programmes are affected for pattern 2, I have attached the complete
`/var/log/syslog` which contains several occurrences today (I have not
had a clean restart today, all cases were hard resets).
--
System info:
Machine type: Lenovo L480, 20LS0025GE
BIOS date: 2020-02-18, version R0QET61W (1.38)
(K)Ubuntu 20.04, upgraded from (K)Ubuntu 19.10 on 2020-05-19
dario@dario-ThinkPad-L480:~$ lspci
00:00.0 Host bridge: Intel Corporation Xeon E3-1200 v6/7th Gen Core Processor
Host Bridge/DRAM Registers (rev 08)
00:02.0 VGA compatible controller: Intel Corporation UHD Graphics 620 (rev 07)
00:04.0 Signal processing controller: Intel Corporation Xeon E3-1200 v5/E3-1500
v5/6th Gen Core Processor Thermal Subsystem (rev 08)
00:08.0 System peripheral: Intel Corporation Xeon E3-1200 v5/v6 / E3-1500 v5 /
6th/7th/8th Gen Core Processor Gaussian Mixture Model
00:14.0 USB controller: Intel Corporation Sunrise Point-LP USB 3.0 xHCI
Controller (rev 21)
00:14.2 Signal processing controller: Intel Corporation Sunrise Point-LP
Thermal subsystem (rev 21)
00:15.0 Signal processing controller: Intel Corporation Sunrise Point-LP Serial
IO I2C Controller #0 (rev 21)
00:15.2 Signal processing controller: Intel Corporation Sunrise Point-LP Serial
IO I2C Controller #2 (rev 21)
00:16.0 Communication controller: Intel Corporation Sunrise Point-LP CSME HECI
#1 (rev 21)
00:1c.0 PCI bridge: Intel Corporation Sunrise Point-LP PCI Express Root Port #1
(rev f1)
00:1c.4 PCI bridge: Intel Corporation Sunrise Point-LP PCI Express Root Port #5
(rev f1)
00:1c.7 PCI bridge: Intel Corporation Sunrise Point-LP PCI Express Root Port #8
(rev f1)
00:1d.0 PCI bridge: Intel Corporation Sunrise Point-LP PCI Express Root Port #9
(rev f1)
00:1d.2 PCI bridge: Intel Corporation Sunrise Point-LP PCI Express Root Port
#11 (rev f1)
00:1f.0 ISA bridge: Intel Corporation Sunrise Point LPC Controller/eSPI
Controller (rev 21)
00:1f.2 Memory controller: Intel Corporation Sunrise Point-LP PMC (rev 21)
00:1f.3 Audio device: Intel Corporation Sunrise Point-LP HD Audio (rev 21)
00:1f.4 SMBus: Intel Corporation Sunrise Point-LP SMBus (rev 21)
00:1f.6 Ethernet controller: Intel Corporation Ethernet Connection (4) I219-V
(rev 21)
03:00.0 Non-Volatile memory controller: Lenovo Device 0005
04:00.0 SD Host controller: O2 Micro, Inc. SD/MMC Card Reader Controller (rev
01)
06:00.0 Network controller: Intel Corporation Wireless 8265 / 8275 (rev 78)
dario@dario-ThinkPad-L480:~$ lsusb
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 009: ID 2cb7:0210 FIBOCOM L830-EB-00
Bus 001 Device 005: ID 06cb:009a Synaptics, Inc.
Bus 001 Device 004: ID 04f2:b604 Chicony Electronics Co., Ltd Integrated Camera
(1280x720@30)
Bus 001 Device 007: ID 8087:0a2b Intel Corp.
Bus 001 Device 002: ID 058f:9540 Alcor Micro Corp. AU9540 Smartcard Reader
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
--
If you need anything else, I'll of course try to provide as much information as
possible.
Thanks id advance for looking into it.
** Affects: ubuntu
Importance: Undecided
Status: New
** Attachment added: "syslog"
https://bugs.launchpad.net/bugs/1883740/+attachment/5384439/+files/syslog
--
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1883740
Title:
Lenovov L480 crashes
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+bug/1883740/+subscriptions
--
ubuntu-bugs mailing list
[email protected]
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
