Re: Strange output on the console

[Steven Rostedt]

On Fri, 25 Feb 2022 11:11:49 +0000
David Laight <David.Laight@xxxxxxxxxx> wrote:

> TntiTet_TetkT t:TetyTvt:TntaTttTet TeteTvtnTntnTvtnT teT teTettTettKTeteTttnTnteTttaTttaTetKTttOTet:TvtnTvtltTntw Tnt:T tOTvt_Tnt:TvtKTntnT tsTvtsTttsTttsTttosTvtotTtt:TntrTntOTet T ttTvtKT tKT teTnttTettTntaTntdTttaT taTeteT tTtt TttrTntlTvt:TetkT tTtttTnteTttOTetkTvtsTeteT tlTttoTntoTetpTvtpTetsTvtvTvteTntOTet
> TttTetsTetsTntsTetKT t TttiTttT tnT tOTnt_TttrTtttTntKTetOTtteTnt:T tKTttpTvdoT dxTvdnTtd TedtTedoTvdiTedaTedT d Ttd:TedtTtd TeddTvdKTediTndgTednTtdgTtd TedKT snTesTtsOTesKTnstTvsOTvsTnsKTvs:Tts:TesTvs:Tns Tes T sdTts TtsoTesOTtslTesnTesKTesOTns
> TnsTesOT s T sKTesOT sKTvsOTtsTtsKTtsT sKTesTesKT sKTesOT siT stTnsaTvsaTesKTnsOT s
> TesKTnsT s TvsKTeslT sOTesT sKTtseTnseTvs_Tts_T sOTes TnsOT s T spTespTesdTesdTeseTtseTeseTt_rTe_rTv_oTes:T s:Tes:TnfwOTvfrKT fwT frTefpuTefpKTefpTvf:TnsOTvsOTnsoTvs Tvs TvsTtssTnsT sKTesTnsTvsTtsoTesmTnsgTesiTeslTtsTvsKTnsTvsOTtsT s_Tnsu
> 
> which really doesn't have enough different characters in it to be a fifo problem.
> That looks like a UART struggling to find valid start and stop bits
> on a continuous data stream that doesn't match the baud rate.

The output was misleading as a lot of the characters were overwritten due
to the backspace character being one of the characters that were outputted.

Anyway, it looks to have been a fifo issue considering the problem goes
away after applying:

commit 6a7b9f002eca6788d346c16a6ff0c218b41f8d1d
Author: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Date:   Wed Jan 26 14:33:58 2022 +0100

    Revert "tty: serial: Use fifo in 8250 console driver"


-- Steve