David, I see a garbage sequence like this all the time. I run an Expect script that controls my terminal emulator (kermit), and I see a sequence like this: [[39;88R I have tried multiple times to have Expect eat or delete this output before handing control to my terminal emulator. Once Expect hands control I see: ;88R I have also tried modifying settings in my terminal emulator to see if the ANSI sequence would be eaten by the terminal emulator. This has also been ineffective. So once my Expect script has handed control to me, I have to manually press CR to clear the excess bytes. This gives me an error message from Bash: -sh: syntax error near unexpected token `;' So I know the characters are in the Bash input stream. Like you, I have no idea where they are coming from, and all my mitigation attempts have failed. None of my compatriots have the issue, so far as I know. When I brought this to the attention of some of my team members, none claimed to have the same issue. As my toolset is the outlier in the group, I just resigned myself to suffering with the issue. On 2/17/21 11:11 PM, David Wang (¤ý®¶¦t) wrote: > Hi all, > when I use the host console via uart to log in to os, sometimes some unexpected output is print to stdout, such as: > > login: root > Password: > Last Login: Thu Jan 7 06:52:18 UTC 2021 on ttyS0 > root@intel-corei7-64:~# ;153R <------- This is the unexpected output > > It also happen when using obmc-console-client or ipmitool sol activate. > It looks like an ANSI Escape sequence > "EscLine;ColumnR Response: cursor is at v,h CPR" > ref: http://ascii-table.com/ansi-escape-sequences-vt-100.php > ref: https://stackoverflow.com/questions/16026858/reading-the-device-status-report-ansi-escape-sequence-reply > > My question is, > how to prevent this escape sequence from printing to the stdout? > Which package in openbmc is doing this? > Has anyone had a similar problem? > Please leave any comments. > Thanks > > David > -- Johnathan Mantey Senior Software Engineer *azad te**chnology partners* Contributing to Technology Innovation since 1992 Phone: (503) 712-6764 Email: johnathanx.mantey@intel.com