Subj : Javascript restriction in Trixie
To   : All
From : bp
Date : Mon Dec 08 2025 10:00:01

I just set up another Trixie install for a Pi2Bv1.1, so armv7, for
use with an Owon vds1022 USB oscilloscope. I have an older install
(bookworm) on a separate microSD card which works correctly, but the 
card is too small (8GB) to allow useful working space. The new install
is less than a year newer than the working one. 

The new install allows installation of Florentbr's software found at
GitHub but when the software is run it gets stuck in a loop and can't
connect to the 'scope:

bob@raspberrypi:~/OWON-VDS1022-1.1.5-cf19 $ sudo owon-vds-tiny
env: Linux, Java 25.0.1 arm
app dir: /opt/owon-vds-tiny
user dir: /root/.owon-vds-tiny
locale: en_US, en_US, true
WARNING: A restricted method in java.lang.System has been called
WARNING: java.lang.System::load has been called by ch.ntb.usb.LibusbJava in an unnamed module (file:/opt/owon-vds-tiny/lib/ch.ntb.usb-0.5.9.jar)
WARNING: Use --enable-native-access=ALL-UNNAMED to avoid a warning for callers in this module
WARNING: Restricted methods will be blocked in a future release unless native access is enabled

ch.ntb.usb.USBException: LibusbJava.usb_claim_interface: Device or resource busy
	at com.owon.uppersoft.vds.core.usb.CDevice.open(CDevice.java:91)
	at com.owon.uppersoft.vds.core.usb.CDevice.getDevices(CDevice.java:300)
	at com.owon.uppersoft.dso.source.usb.USBSourceManager.refreshUSBPort(USBSourceManager.java:79)
	at com.owon.uppersoft.dso.source.comm.detect.USBLoopChecker.checkUSBDevice(USBLoopChecker.java:74)
	at com.owon.uppersoft.dso.source.comm.USBDaemonHelper.onNotConnecting(USBDaemonHelper.java:35)
	at com.owon.uppersoft.vds.machine.InfiniteDaemonTiny0.onNotConnecting(InfiniteDaemonTiny0.java:37)
	at com.owon.uppersoft.dso.source.comm.Flow.run(Flow.java:79)
	at com.owon.uppersoft.dso.global.ControlAppsTiny$1.run(ControlAppsTiny.java:38)

that never seems to stop.

The warning prompted me to try running under sudo, but that made no difference.

On closer inspection, it's not clear the warning has any relevance to the 
"device or resource busy" message. Busy isn't the same as restricted.

If anybody's got a suggestion please post!

Thanks for reading,

bob prohaska
 

--- PyGate Linux v1.5.1
 * Origin: Dragon's Lair, PyGate NNTP<>Fido Gate (3:633/10)

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