** Description changed: From the CVS Driver perspective, camera ownership is already handled by the driver. When running with firmware that supports Protocol 2.0 or later, the driver sends a command to indicate that SENSING OFF is required. However, for firmware that only supports Protocol 1.0, there is no mechanism to notify the firmware of a SENSING OFF state. Historically, this was not an issue because Linux did not have any users of HPD (Human Presence Detection) functionality. ISH was not enabling or registering those sensors, so CVS would never receive HPD-related notifications. However, in the current scenario, it appears that the sensors are being registered and treated as HPD-capable devices under Linux, resulting in ISH sending HPD-related commands to CVS FW. This behavior is unexpected on Linux and is not part of the Linux POR. The CVS driver has no visibility into when ISH sends HPD notifications to CVS FW, nor does it have a mechanism to detect an unexpected HPD ownership transition and perform any blocking, recovery, or re- handshake. Even on Windows, these are independent communication paths operating in parallel. + + Affects: https://certification.canonical.com/hardware/202606-39025/
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2163863 Title: New CVS firmware protocol 2.0 takes additional handshake command flag to disable HPD To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2163863/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
