Public bug reported: ---Problem Description--- TigerVNC 1.11.0 contains a regression that causes vncviewer to display incorrect colors when vncviewer and X11 server use different endianness (e.g., when using X11 forwarding via SSH between an x86-64 desktop and a Linux system on s390x). The regression was originally reported in github issue https://github.com/TigerVNC/tigervnc/issues/1073 and fixed in github pull request https://github.com/TigerVNC/tigervnc/pull/1084
The regression caused vncviewer to always use the system byte order for pixel values instead of the byte order required by the X11 display. With the fix, vncviewer queries the X11 display for the required byte order. As of now, the fix has not made it into a release yet. Please consider backporting the fix (upstream commit 7ab92639848). I confirmed that this commit cleanly applies on top of release 1.11.0 and fixes the regression. ---uname output--- Linux s390x Machine Type = x15 ---Debugger--- A debugger is not configured ---Steps to Reproduce--- See also https://github.com/TigerVNC/tigervnc/issues/1252 - From a Linux x86 system, connect to a Linux system on s390x via SSH with X forwarding - Start a Xvnc session on that Linux system tigervncserver :0 -geometry 800x600 -depth 32 - Start vncviewer on the same Linux system xtigervncviewer :0 - On vncviewer's window on your origin X session, observe incorrect colors. - Optionally, start X11 programs such as xlogo, xclock, or xeyes to make the problem obvious - Optionally, connect to the vnc session directly (i.e., with a vnc client on the origin system) to compare Userspace tool common name: vncviewer The userspace tool has the following bit modes: 64-bit Userspace rpm: tigervnc-viewer Userspace tool obtained from project website: na ** Affects: linux (Ubuntu) Importance: Undecided Assignee: Skipper Bug Screeners (skipper-screen-team) Status: New ** Tags: architecture-s39064 bugnameltc-192826 severity-medium targetmilestone-inin--- ** Tags added: architecture-s39064 bugnameltc-192826 severity-medium targetmilestone-inin--- ** Changed in: ubuntu Assignee: (unassigned) => Skipper Bug Screeners (skipper-screen-team) ** Package changed: ubuntu => linux (Ubuntu) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1929790 Title: Request to backport fix for endianness issue in TigerVNC vncviewer To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1929790/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
