Random unrecoverable freezes on Ubuntu 18.10

[Darek]

I reported this bug on a Samsung laptop. The same happened when using a toshiba laptop. When I open the chrome, the cursor has frozen and the screen turns off. No key combination worked and I had to force my laptop off. In the system log the error appeared at 12.12

ProblemType: Bug
DistroRelease: Ubuntu 18.10
Package: linux-image-4.18.0-15-generic 4.18.0-15.16
ProcVersionSignature: Ubuntu 4.18.0-15.16-generic 4.18.20
Uname: Linux 4.18.0-15-generic x86_64
ApportVersion: 2.20.10-0ubuntu13.2
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: ht 1985 F.... pulseaudio
CurrentDesktop: ubuntu:GNOME
Date: Sun Feb 10 12:59:48 2019
HibernationDevice: RESUME=UUID=6e0c43c9-f6a3-446c-a049-f4e3612debc9
InstallationDate: Installed on 2018-04-01 (314 days ago)
InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Alpha amd64 (20180401)
MachineType: TOSHIBA Satellite A215
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=pl_PL.UTF-8
 SHELL=/bin/bash
ProcFB: 0 radeondrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.18.0-15-generic root=UUID=a482a589-677f-407b-b072-db9669f6f3ce ro quiet splash acpi=noirq vt.handoff=1
RelatedPackageVersions:
 linux-restricted-modules-4.18.0-15-generic N/A
 linux-backports-modules-4.18.0-15-generic N/A
 linux-firmware 1.175.1
RfKill:
 0: phy0: Wireless LAN
  Soft blocked: no
  Hard blocked: no
SourcePackage: linux
UpgradeStatus: Upgraded to cosmic on 2018-09-22 (140 days ago)
dmi.bios.date: 01/25/2010
dmi.bios.vendor: Phoenix Technologies LTD
dmi.bios.version: 2.00
dmi.board.name: SB600
dmi.board.vendor: ATI
dmi.board.version: Rev 1
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: AMD
dmi.chassis.version: None
dmi.modalias: dmi:bvnPhoenixTechnologiesLTD:bvr2.00:bd01/25/2010:svnTOSHIBA:pnSatelliteA215:pvrPSAFGU-07101J:rvnATI:rnSB600:rvrRev1:cvnAMD:ct10:cvrNone:
dmi.product.name: Satellite A215
dmi.product.version: PSAFGU-07101J
dmi.sys.vendor: TOSHIBA

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This change was made by a bot.

[Kai-Heng Feng (kaihengfeng)]

Would it be possible for you to test the latest upstream kernel? Refer
to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest
v5.0-rc7 kernel[0].

If this bug is fixed in the mainline kernel, please add the following
tag 'kernel-fixed-upstream'.

If the mainline kernel does not fix this bug, please add the tag:
'kernel-bug-exists-upstream'.

Once testing of the upstream kernel is complete, please mark this bug as
"Confirmed".

Thanks in advance.

[0] https://kernel.ubuntu.com/~kernel-ppa/mainline/v5.0-rc7/

[Kai-Heng Feng (kaihengfeng)]

Also please remove non-default kernel parameter.

[Darek (d-paczko)]

Sorry for late reply. I can only test it on a Samsung laptop because
Toshiba laptop is with my in-laws, who live quite far away from me. Is
testing the v5.0-rc7 up to date?
Yours faithfullyDarek

W dniu śro, 20.02.2019 o godzinie 12∶36 +0000, użytkownik Kai-Heng Feng
napisał:
> Would it be possible for you to test the latest upstream kernel?
> Referto https://wiki.ubuntu.com/KernelMainlineBuilds . Please test
> the latestv5.0-rc7 kernel[0].
> If this bug is fixed in the mainline kernel, please add the
> followingtag 'kernel-fixed-upstream'.
> If the mainline kernel does not fix this bug, please add the
> tag:'kernel-bug-exists-upstream'.
> Once testing of the upstream kernel is complete, please mark this bug
> as"Confirmed".
>
> Thanks in advance.
> [0] https://kernel.ubuntu.com/~kernel-ppa/mainline/v5.0-rc7/
>

[Kai-Heng Feng (kaihengfeng)]

Now the latest one is v5.0.

[Darek (d-paczko)]

OK. I installed version 5.0. What should I do now to test this? I
worked with a new kernel for 2 days and there was no crash.

W dniu śro, 06.03.2019 o godzinie 10∶48 +0000, użytkownik Kai-Heng Feng
napisał:
> Now the latest one is v5.0.
>