I had been running with a USB GPS for years and recently purchased a GOOD GNSS
device, so I have not had anything on this machine that accesses the pps_api
until a few days ago.
FYI I have a Raspberry Pi with Ubuntu where the pps_api works with
raspberrypi-kernel 1:1.2010727-1 if that is of any help.
I see two other kernels installed: 5.4.0-54 and 5.4.0-77.
Any suggestion on which to try as it is somewhat of a PITA to do this, would
rather do it just once, and will have to schedule a time, hopefully in a day or
so.
Also I have had no reason to do this for years and have forgotten how. As I
recall, it is just hold down a key while rebooting to get to the menu to select
a kernel, but don't remember which key.
On Wednesday, August 4, 2021, 6:30:46 AM PDT, Kleber Sacilotto de Souza
<1938...@bugs.launchpad.net> wrote:
Hello Jim,
Did it work before with your system and got broken after a kernel
update? If yes, would you be able to identify the kernel version which
was working before? If you didn't run this use case before, would you be
able to boot with an older kernel version and check whether it works?
Thanks.
** Also affects: linux (Ubuntu Focal)
Importance: Undecided
Status: New
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You received this bug notification because you are subscribed to the bug
report.
https://bugs.launchpad.net/bugs/1938626
Title:
PPS API broken
Status in linux package in Ubuntu:
New
Status in linux source package in Focal:
New
Bug description:
The kernel PPS API appears to be broken. I have a serial GPS with PPS
attached to /dev/ttyS4. If I use gpsd to create /dev/pps0, gpsd fails
to see PPS data. If I disable gpsd and create /dev/pps0 with ldattach,
any app or tool run against ttyS4 works fine and does see the CTS
transitions every second, i.e. gpsmon and ppscheck. Anything run
against pps0 fails, i.e. ppstest, ppswatch. ntpd gets data from ttyS4
but not pps0.
There are some issues with stock apparmor with gpsd and ntpd, but I
have solved those.
ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: linux-image-5.4.0-80-generic 5.4.0-80.90
ProcVersionSignature: Ubuntu 5.4.0-80.90-generic 5.4.124
Uname: Linux 5.4.0-80-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.18
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC1: jimp 6811 F.... pulseaudio
CasperMD5CheckResult: skip
CurrentDesktop: GNOME-Flashback:GNOME
Date: Sat Jul 31 16:41:32 2021
HibernationDevice: RESUME=UUID=90289c8f-5a00-46c4-8f1f-79dd26128f39
InstallationDate: Installed on 2016-08-05 (1820 days ago)
InstallationMedia: Ubuntu-Server 16.04.1 LTS "Xenial Xerus" - Release amd64
(20160719)
ProcEnviron:
TERM=xterm-256color
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcFB: 0 i915drmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-80-generic
root=UUID=389dcb0d-84f2-4340-ad6c-e4f1dbe55b67 ro quiet splash vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-5.4.0-80-generic N/A
linux-backports-modules-5.4.0-80-generic N/A
linux-firmware 1.187.15
SourcePackage: linux
UpgradeStatus: Upgraded to focal on 2020-11-09 (264 days ago)
dmi.bios.date: 11/26/2009
dmi.bios.vendor: Intel Corp.
dmi.bios.version: TYG4110H.86A.0036.2009.1126.2047
dmi.board.asset.tag: To be filled by O.E.M.
dmi.board.name: DG41TY
dmi.board.vendor: Intel Corporation
dmi.board.version: AAE47335-302
dmi.chassis.type: 3
dmi.modalias:
dmi:bvnIntelCorp.:bvrTYG4110H.86A.0036.2009.1126.2047:bd11/26/2009:svn:pn:pvr:rvnIntelCorporation:rnDG41TY:rvrAAE47335-302:cvn:ct3:cvr:
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1938626/+subscriptions
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You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1938626
Title:
PPS API broken
Status in linux package in Ubuntu:
New
Status in linux source package in Focal:
New
Bug description:
The kernel PPS API appears to be broken. I have a serial GPS with PPS
attached to /dev/ttyS4. If I use gpsd to create /dev/pps0, gpsd fails
to see PPS data. If I disable gpsd and create /dev/pps0 with ldattach,
any app or tool run against ttyS4 works fine and does see the CTS
transitions every second, i.e. gpsmon and ppscheck. Anything run
against pps0 fails, i.e. ppstest, ppswatch. ntpd gets data from ttyS4
but not pps0.
There are some issues with stock apparmor with gpsd and ntpd, but I
have solved those.
ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: linux-image-5.4.0-80-generic 5.4.0-80.90
ProcVersionSignature: Ubuntu 5.4.0-80.90-generic 5.4.124
Uname: Linux 5.4.0-80-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.18
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC1: jimp 6811 F.... pulseaudio
CasperMD5CheckResult: skip
CurrentDesktop: GNOME-Flashback:GNOME
Date: Sat Jul 31 16:41:32 2021
HibernationDevice: RESUME=UUID=90289c8f-5a00-46c4-8f1f-79dd26128f39
InstallationDate: Installed on 2016-08-05 (1820 days ago)
InstallationMedia: Ubuntu-Server 16.04.1 LTS "Xenial Xerus" - Release amd64
(20160719)
ProcEnviron:
TERM=xterm-256color
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcFB: 0 i915drmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-80-generic
root=UUID=389dcb0d-84f2-4340-ad6c-e4f1dbe55b67 ro quiet splash vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-5.4.0-80-generic N/A
linux-backports-modules-5.4.0-80-generic N/A
linux-firmware 1.187.15
SourcePackage: linux
UpgradeStatus: Upgraded to focal on 2020-11-09 (264 days ago)
dmi.bios.date: 11/26/2009
dmi.bios.vendor: Intel Corp.
dmi.bios.version: TYG4110H.86A.0036.2009.1126.2047
dmi.board.asset.tag: To be filled by O.E.M.
dmi.board.name: DG41TY
dmi.board.vendor: Intel Corporation
dmi.board.version: AAE47335-302
dmi.chassis.type: 3
dmi.modalias:
dmi:bvnIntelCorp.:bvrTYG4110H.86A.0036.2009.1126.2047:bd11/26/2009:svn:pn:pvr:rvnIntelCorporation:rnDG41TY:rvrAAE47335-302:cvn:ct3:cvr:
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1938626/+subscriptions
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