** Description changed: [ Impact ] - * When a user connects from a local `far2l` instance to a remote one - over SSH in TTY|F mode, any action that triggers the "Clipboard access" - dialog (such as copying or pasting) causes the local `far2l` client to - hang indefinitely. This makes a key feature of remote work unusable and - forces the user to kill the local `far2l` process to recover. This is a - regression introduced in a previous update (commit d1fed9a). + * Any action that triggers the "Clipboard access" dialog in far2l + virtual termial (such as copying or pasting) far2l to hang. This forces + the user to kill the far2l process to recover. This is a regression + introduced in a previous update (commit d1fed9a). * The fix addresses the root cause of the hang, which was an infinite loop in the console repaint logic (`SetConsoleRepaintsDefer` / `ConsoleOutput::RepaintsDeferFinish`). When the clipboard dialog was supposed to appear over the nested TTY|F session, the repaint mechanism would get stuck. The uploaded patch corrects this logic, ensuring the dialog is drawn correctly without entering a loop, thus resolving the application hang. [ Test Plan ] - * Objective: To verify that the local `far2l` client no longer hangs - when accessing the clipboard in a remote TTY|F session. - - * Setup: - 1. You will need two systems (physical or virtual) with `far2l` installed and SSH access configured between them. Let's call them `local-host` and `remote-host`. - 2. Ensure you can SSH from `local-host` to `remote-host`. + * Objective: To verify that far2l no longer hangs when accessing the + clipboard in internal VT: * Steps to reproduce the bug (with the old package): - 1. On `local-host`, start `far2l` normally. - 2. Within the local `far2l`, connect to the remote host via SSH (e.g., using the NetBox plugin or by running `ssh user@remote-host` from the command line) and run far2l --tty. You should now see the remote `far2l` interface running inside your local `far2l` window. - 3. In the remote session, attempt a clipboard operation. - 4. BUG: The local `far2l` instance will freeze. The "Clipboard access" dialog will not appear, and the application will become unresponsive. + 1. Start `far2l`. + 2. Attempt a OSC52 clipboard operation in its VT, like this: printf '\e]52;c;dGVzdA==\a' + 3. BUG: The local `far2l` instance will freeze. The "Clipboard access" dialog will not appear, and the application will become unresponsive. * Steps to verify the fix (with the new package): - 1. Follow steps 1-4 from the reproduction plan above. - 2. VERIFICATION: The "Clipboard access" dialog should appear correctly on the local `far2l` instance. The application will not hang. The user can interact with the dialog (e.g., press OK or Cancel), and both the local and remote `far2l` sessions will remain fully functional. + 1. Follow steps 1-2 from the reproduction plan above. + 2. VERIFICATION: The "Clipboard access" dialog should appear correctly. The application will not hang. The user can interact with the dialog (e.g., press OK or Cancel), and far2l will remain fully functional. [ Where problems could occur ] * The fix modifies the core console repaint and dialog handling logic. A regression here could have several visual or functional side effects. * Rendering Artifacts: The change could inadvertently cause other dialogs (not just the clipboard access one) to render incorrectly. This could manifest as missing dialogs, visual corruption, or "ghost" images from the host session appearing where they shouldn't. Btw, the updated app was tested in the PPA by enthusiasts, including various dialog and screen update checks, and no problems were found. [ Other Info ] * Original upstream bug report: `https://github.com/elfmz/far2l/issues/2634` * This bug is a regression introduced by upstream commit `d1fed9a`, which makes fixing it in a stable release a high priority.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2114513 Title: Clipboard access confirmation (OSC52) dialog freeze To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/far2l/+bug/2114513/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
