** Changed in: linux-raspi (Ubuntu)
Status: New => Invalid
** Description changed:
- TBD
+ [Impact]
+
+ Hangs and lockups are observed when lots of USB interrupts occur.
+
+ [Test Case]
+
+ Connect a USB/serial adapter to the Pi. Run 'minicom -D /dev/ttyUSB0'.
+ Sent data over that serial connection from a remote device. The Pi will
+ hang within seconds.
+
+ [Regression Potential]
** Description changed:
[Impact]
Hangs and lockups are observed when lots of USB interrupts occur.
[Test Case]
Connect a USB/serial adapter to the Pi. Run 'minicom -D /dev/ttyUSB0'.
- Sent data over that serial connection from a remote device. The Pi will
+ Send data over that serial connection from a remote device. The Pi will
hang within seconds.
[Regression Potential]
--
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux-raspi in Ubuntu.
https://bugs.launchpad.net/bugs/1890808
Title:
Build preemptible raspi kernels
Status in linux-raspi package in Ubuntu:
Invalid
Status in linux-raspi source package in Focal:
New
Bug description:
[Impact]
Hangs and lockups are observed when lots of USB interrupts occur. The
FIQ handling in the dwc_otg driver seems to be particular susceptible
to this setting.
[Test Case]
Connect a USB/serial adapter to the Pi. Run 'minicom -D /dev/ttyUSB0'.
Send data over that serial connection from a remote device. The Pi
will hang within seconds.
[Regression Potential]
This change enables full preemption which could uncover all sorts of
problems like hangs and/or lockups.
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux-raspi/+bug/1890808/+subscriptions
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