Bug#987377: rescue-mode: when in graphical mode, locks up one prompt before the shell

To: 987377@bugs.debian.org
Cc: Philip Hands <phil@hands.com>
Subject: Bug#987377: rescue-mode: when in graphical mode, locks up one prompt before the shell
From: Cyril Brulebois <kibi@debian.org>
Date: Mon, 26 Apr 2021 08:01:49 +0200
Message-id: <[🔎] 20210426060149.vymujny4xc43jj4f@mraw.org>
Reply-to: Cyril Brulebois <kibi@debian.org>, 987377@bugs.debian.org
In-reply-to: <[🔎] 20210425130022.twfls7wroy6z7vna@mraw.org>
References: <[🔎] 161911944184.27997.9735798848803525371.reportbug@rummy.hk.hands.com> <[🔎] 87fszixcq5.fsf@hands.com> <[🔎] 161911944184.27997.9735798848803525371.reportbug@rummy.hk.hands.com> <[🔎] 20210422212008.GF16813@tack.einval.com> <[🔎] 161911944184.27997.9735798848803525371.reportbug@rummy.hk.hands.com> <[🔎] 87y2d8waiv.fsf@hands.com> <[🔎] 161911944184.27997.9735798848803525371.reportbug@rummy.hk.hands.com> <[🔎] 20210424052257.crvd2lysgc3xxcwl@mraw.org> <[🔎] 161911944184.27997.9735798848803525371.reportbug@rummy.hk.hands.com> <[🔎] 20210425130022.twfls7wroy6z7vna@mraw.org> <[🔎] 161911944184.27997.9735798848803525371.reportbug@rummy.hk.hands.com>

Cyril Brulebois <kibi@debian.org> (2021-04-25):
> I've ran out of (apparently stupid this time around…) wild guesses, so
> I suppose after a little nap it's going to be (heavy) hammer time…

I'm attaching an almost unedited version of my notes from yesterday.
It's not a definitive guide but might give someone else a leg up for a
similar debug session.

Our winner is the libpango1.0-udeb upgrade from 1.42.4-8 to 1.44.7-3 in
April (last year), which I'll file a bug report against, blocking this
one.

I suspect this also explains the other issue, but I have not confirmed
this yet (it's not trivially reproduced with the netboot-gtk mini.iso,
so I've got to do some debian-cd dance with the relevant vmzlinuz and
initrd to make sure I get the proper test framework).


Cheers,
-- 
Cyril Brulebois (kibi@debian.org)            <https://debamax.com/>
D-I release manager -- Release team member -- Freelance Consultant

# Data

| snapshot timestamps | d-i version | d-i codename     |
|------------------------------------------------------|
| 20191129T150627Z    | 20191129    | Bullseye Alpha 1 |
| 20200315T090339Z    | 20200314    | Bullseye Alpha 2 |
| 20201203T092240Z    | 20201202    | Bullseye Alpha 3 |
| 20210415T151642Z    | 20210415    | Bullseye RC 1    |


# Tests

## Initial testing

A `kibi/snapshot-isolinux` branch exists, that tweaks the isolinux
menu to preseed a number of parameters **for rescue mode**. This isn't
supposed to be a very clean patch! (But it's sufficient to explore
<https://bugs.debian.org/987377>)


Checkout the `20200314` tag, with `kibi/snapshot-isolinux` branch
cherry-picked to get the right `mirror/http/hostname` and
`mirror/http/directory` parameters set in the `isolinux` configuration
for the `netboot-gtk` image, and with the original `20200315T090339Z`
timestamp: **OK**

Checkout the `20201202` tag, with `kibi/snapshot-isolinux` branch
cherry-picked to get the right `mirror/http/hostname` and
`mirror/http/directory` parameters set in the `isolinux` configuration
for the `netboot-gtk` image, and with the original `20201203T092240Z`
timestamp: **KO**

Conclusion: this reproduces the results with Netinst images for
Bullseye Alpha 2 (OK) and Bullseye Alpha 3 (KO).


## Methodology

Below are listed all timestamps between both timestamp and version
referenced above.

First approach: stick to the `20200314` baseline for the installer,
cherry-pick the `kibi/snapshot-isolinux` branch, and fix build breakages
when they occur (e.g. ABI bump). Try one timestamp per month, moving
forward in time to find a first new **KO** that isn't the Alpha 3
timestamp. Then bisect.

Second approach, fit the first one doesn't yield results: move to the
`20201202` baseline for the installer, do the cherry-pick. Before
actually bisecting, try one timestamp per month, moving backward in time
to find the first new **OK** that isn't the Alpha 2 timestamp. Then
bisect.

Build with:

    export TS=${selected_timestamp}

    git clean -xdf                                                            && \
    make -C build/ rebuild_netboot-gtk USE_UDEBS_FROM=testing SNAPSHOT_TS=$TS && \
    cp build/dest/MANIFEST.udebs ~/di-debug/MANIFEST.udebs-$TS

Once the diff between `MANIFEST.udebs-*` for **OK** and **KO** is
small enough, we likely have a winner.

To confirm, fetch the OK version of the relevant udeb(s), use
`deb-reversion` to add an epoch and make it (them) have a higher
version than the most recent one, stash them into `build/localudebs/`
and verify that Alpha 3 with that revert is also fine.


## Timestamps

### 2020-03

 - 20200315T090339Z **OK**
 - 20200315T152212Z
 - 20200315T205917Z
 - 20200316T042716Z
 - 20200316T093023Z
 - 20200316T165508Z
 - 20200316T225909Z
 - 20200317T045347Z
 - 20200317T102346Z
 - 20200317T152851Z
 - 20200317T223326Z
 - 20200318T034624Z
 - 20200318T085758Z
 - 20200318T161225Z
 - 20200318T232918Z
 - 20200319T050441Z
 - 20200319T100843Z
 - 20200319T150826Z
 - 20200319T222751Z
 - 20200320T035025Z
 - 20200320T092429Z
 - 20200320T160615Z
 - 20200320T222820Z
 - 20200321T031545Z
 - 20200321T105339Z
 - 20200321T161928Z
 - 20200321T211113Z
 - 20200322T031319Z
 - 20200322T094224Z
 - 20200322T155645Z
 - 20200322T211017Z
 - 20200323T032807Z
 - 20200323T101008Z
 - 20200323T151303Z
 - 20200323T214010Z
 - 20200324T034926Z
 - 20200324T091145Z
 - 20200324T154732Z
 - 20200324T222113Z
 - 20200325T030923Z
 - 20200325T094213Z
 - 20200325T162824Z
 - 20200325T211709Z
 - 20200326T034955Z
 - 20200326T101808Z
 - 20200326T153328Z
 - 20200326T221821Z
 - 20200327T030713Z
 - 20200327T095938Z
 - 20200327T153530Z
 - 20200327T213510Z
 - 20200328T035040Z
 - 20200328T093221Z
 - 20200329T101703Z
 - 20200329T121235Z
 - 20200329T145815Z
 - 20200329T204618Z
 - 20200330T024216Z
 - 20200330T084558Z
 - 20200330T150032Z
 - 20200330T204311Z
 - 20200331T024956Z
 - 20200331T083805Z **OK**

### 2020-04

 - 20200401T154401Z
 - 20200401T212842Z
 - 20200402T024334Z
 - 20200402T085022Z
 - 20200402T150804Z
 - 20200402T215606Z
 - 20200403T024902Z
 - 20200403T084831Z
 - 20200403T145042Z
 - 20200403T204455Z
 - 20200404T041223Z
 - 20200404T100204Z
 - 20200404T144636Z
 - 20200404T204647Z
 - 20200405T024621Z
 - 20200405T084040Z
 - 20200405T150154Z
 - 20200405T204123Z
 - 20200406T024237Z
 - 20200406T084528Z
 - 20200406T143302Z
 - 20200406T204537Z
 - 20200407T024112Z **OK**
 - 20200407T084056Z
 - 20200407T144315Z
 - 20200407T204647Z
 - 20200408T025735Z
 - 20200408T082336Z
 - 20200408T150538Z
 - 20200408T204533Z
 - 20200409T022909Z **OK**
 - 20200409T085010Z
 - 20200409T144901Z
 - 20200409T203114Z
 - 20200410T025304Z
 - 20200410T084926Z **OK**
 - 20200410T155105Z
 - 20200410T214949Z
 - 20200411T025140Z
 - 20200411T083104Z
 - 20200411T143911Z **KO**
 - 20200411T220810Z
 - 20200412T025028Z
 - 20200412T093855Z
 - 20200412T142911Z
 - 20200412T202743Z
 - 20200413T023320Z
 - 20200413T083920Z
 - 20200413T201859Z
 - 20200414T024755Z
 - 20200414T084143Z
 - 20200414T144249Z
 - 20200414T204951Z
 - 20200415T024424Z
 - 20200415T083012Z
 - 20200415T143955Z
 - 20200415T203918Z
 - 20200416T025115Z **KO** [ABI: 5.5.0-1]
 - 20200416T084218Z
 - 20200416T144937Z
 - 20200416T203857Z
 - 20200417T040322Z
 - 20200417T161510Z
 - 20200417T205512Z
 - 20200418T032518Z
 - 20200418T085038Z
 - 20200418T145444Z
 - 20200418T205923Z
 - 20200419T033910Z
 - 20200419T094015Z
 - 20200419T152225Z
 - 20200419T210133Z
 - 20200420T034421Z
 - 20200420T092617Z
 - 20200420T155747Z
 - 20200420T210233Z
 - 20200421T025405Z
 - 20200421T085850Z
 - 20200421T155915Z
 - 20200421T214331Z
 - 20200422T024816Z
 - 20200422T085230Z
 - 20200422T145249Z
 - 20200422T205110Z
 - 20200423T024554Z
 - 20200423T084728Z
 - 20200423T144352Z
 - 20200423T205118Z
 - 20200424T024812Z
 - 20200424T084703Z
 - 20200424T151944Z
 - 20200424T204736Z
 - 20200425T031815Z
 - 20200425T090528Z
 - 20200425T205355Z
 - 20200426T030336Z
 - 20200426T091947Z
 - 20200426T162557Z
 - 20200426T213908Z
 - 20200427T032704Z
 - 20200427T095527Z
 - 20200427T151833Z
 - 20200427T210822Z
 - 20200428T024810Z
 - 20200428T084257Z
 - 20200428T152315Z
 - 20200428T224331Z
 - 20200429T090736Z
 - 20200429T150608Z
 - 20200429T204608Z
 - 20200430T033200Z
 - 20200430T101304Z
 - 20200430T165901Z
 - 20200430T205603Z **KO** [ABI: 5.5.0-2]

### 2020-05

 - 20200501T025542Z
 - 20200501T095148Z
 - 20200501T154658Z
 - 20200501T222649Z
 - 20200502T032315Z
 - 20200502T085134Z
 - 20200502T150431Z
 - 20200502T205710Z
 - 20200503T025701Z
 - 20200503T085123Z
 - 20200503T144457Z
 - 20200503T203536Z
 - 20200504T024449Z
 - 20200504T084128Z
 - 20200504T145322Z
 - 20200504T205026Z
 - 20200505T024307Z
 - 20200505T084259Z
 - 20200505T150017Z
 - 20200505T210428Z
 - 20200506T024941Z
 - 20200506T090440Z
 - 20200506T150313Z
 - 20200506T205203Z
 - 20200507T030302Z
 - 20200507T090225Z
 - 20200507T144845Z
 - 20200507T210258Z
 - 20200508T032513Z
 - 20200508T090803Z
 - 20200508T145512Z
 - 20200508T204904Z
 - 20200509T025130Z
 - 20200509T112129Z
 - 20200509T144303Z
 - 20200509T205549Z
 - 20200510T023728Z
 - 20200510T084046Z
 - 20200510T144127Z
 - 20200510T203930Z
 - 20200511T030328Z
 - 20200511T084653Z
 - 20200511T144628Z
 - 20200511T204139Z
 - 20200512T025108Z
 - 20200512T084349Z
 - 20200512T145430Z
 - 20200512T204242Z
 - 20200513T025402Z
 - 20200513T084344Z
 - 20200513T150214Z
 - 20200513T204247Z
 - 20200514T024406Z
 - 20200514T084554Z
 - 20200514T144953Z
 - 20200514T204305Z
 - 20200515T024132Z
 - 20200515T083506Z
 - 20200515T145056Z
 - 20200515T204659Z
 - 20200516T024040Z
 - 20200516T083831Z
 - 20200516T144307Z
 - 20200516T204057Z
 - 20200517T024903Z
 - 20200517T084414Z
 - 20200517T144451Z
 - 20200517T204149Z
 - 20200518T024214Z
 - 20200518T083858Z
 - 20200518T144510Z
 - 20200518T205044Z
 - 20200519T024938Z
 - 20200519T084846Z
 - 20200519T150228Z
 - 20200519T212115Z
 - 20200520T032945Z
 - 20200520T085844Z
 - 20200520T145536Z
 - 20200520T205149Z
 - 20200521T025317Z
 - 20200521T084823Z
 - 20200521T144940Z
 - 20200521T204827Z
 - 20200522T024547Z
 - 20200522T084859Z
 - 20200522T145235Z
 - 20200522T205117Z
 - 20200523T024936Z
 - 20200523T084116Z
 - 20200523T143817Z
 - 20200523T210552Z
 - 20200524T025222Z
 - 20200524T084904Z
 - 20200524T145223Z
 - 20200524T205108Z
 - 20200525T024443Z
 - 20200525T083908Z
 - 20200525T145753Z
 - 20200525T204521Z
 - 20200526T024819Z
 - 20200526T084721Z
 - 20200526T150007Z
 - 20200526T204535Z
 - 20200527T025130Z
 - 20200527T085601Z
 - 20200527T144641Z
 - 20200527T205728Z
 - 20200528T024341Z
 - 20200528T083835Z
 - 20200528T144303Z
 - 20200528T203855Z
 - 20200529T024130Z
 - 20200529T083959Z
 - 20200529T144225Z
 - 20200529T203921Z
 - 20200530T025521Z
 - 20200530T082844Z
 - 20200530T143259Z
 - 20200530T211847Z
 - 20200531T025320Z
 - 20200531T084945Z
 - 20200531T150031Z
 - 20200531T211512Z

### 2020-06

 - 20200601T024402Z
 - 20200601T084419Z
 - 20200601T144917Z
 - 20200601T204724Z
 - 20200602T024442Z
 - 20200602T083835Z
 - 20200602T145955Z
 - 20200602T210137Z
 - 20200603T030403Z
 - 20200603T091236Z
 - 20200603T145956Z
 - 20200603T205333Z
 - 20200604T025809Z
 - 20200604T085024Z
 - 20200604T150006Z
 - 20200604T205906Z
 - 20200605T030256Z
 - 20200605T084803Z
 - 20200605T145657Z
 - 20200605T204331Z
 - 20200606T025149Z
 - 20200606T084339Z
 - 20200606T144859Z
 - 20200606T204857Z
 - 20200607T024310Z
 - 20200607T083827Z
 - 20200607T151236Z
 - 20200607T205028Z
 - 20200608T024059Z
 - 20200608T083719Z
 - 20200608T144929Z
 - 20200608T203939Z
 - 20200609T023956Z
 - 20200609T084102Z
 - 20200609T144653Z
 - 20200609T204344Z
 - 20200610T030434Z
 - 20200610T152955Z
 - 20200611T024431Z
 - 20200611T084426Z
 - 20200611T155154Z
 - 20200611T205735Z
 - 20200612T024037Z
 - 20200612T083553Z
 - 20200612T144743Z
 - 20200612T204037Z
 - 20200613T023903Z
 - 20200613T084007Z
 - 20200613T144920Z
 - 20200613T203725Z
 - 20200614T024052Z
 - 20200614T083640Z
 - 20200614T143928Z
 - 20200614T203858Z
 - 20200615T023903Z
 - 20200615T083813Z
 - 20200615T150331Z
 - 20200615T204439Z
 - 20200616T024729Z
 - 20200616T084225Z
 - 20200616T144127Z
 - 20200616T204114Z
 - 20200617T025426Z
 - 20200617T084044Z
 - 20200617T150038Z
 - 20200617T204558Z
 - 20200618T025825Z
 - 20200618T084404Z
 - 20200618T144544Z
 - 20200618T212047Z
 - 20200619T025237Z
 - 20200619T084831Z
 - 20200619T144934Z
 - 20200619T204451Z
 - 20200620T025936Z
 - 20200620T084835Z
 - 20200620T145354Z
 - 20200620T204238Z
 - 20200621T024306Z
 - 20200621T083805Z
 - 20200621T144208Z
 - 20200621T204121Z
 - 20200622T024456Z
 - 20200622T083905Z
 - 20200622T144846Z
 - 20200622T204316Z
 - 20200623T024120Z
 - 20200623T084723Z
 - 20200623T151721Z
 - 20200623T204338Z
 - 20200624T024308Z
 - 20200624T084001Z
 - 20200624T145103Z
 - 20200624T204706Z
 - 20200625T024524Z
 - 20200625T083831Z
 - 20200625T150744Z
 - 20200625T203846Z
 - 20200626T025034Z
 - 20200626T090113Z
 - 20200626T150034Z
 - 20200626T205212Z
 - 20200627T025456Z
 - 20200627T085709Z
 - 20200627T145205Z
 - 20200627T204538Z
 - 20200628T024451Z
 - 20200628T084153Z
 - 20200628T144533Z
 - 20200628T204444Z
 - 20200629T024049Z
 - 20200629T084301Z
 - 20200629T145008Z
 - 20200629T204901Z
 - 20200630T024205Z
 - 20200630T084739Z
 - 20200630T144134Z
 - 20200630T204925Z

### 2020-07

 - 20200701T101354Z
 - 20200701T145157Z
 - 20200701T205447Z
 - 20200702T025543Z
 - 20200702T084146Z
 - 20200702T145154Z
 - 20200702T205102Z
 - 20200703T024850Z
 - 20200703T084307Z
 - 20200703T144716Z
 - 20200703T204447Z
 - 20200704T025342Z
 - 20200704T084321Z
 - 20200704T150818Z
 - 20200704T205323Z
 - 20200705T025030Z
 - 20200705T084305Z
 - 20200705T144229Z
 - 20200705T204532Z
 - 20200706T024300Z
 - 20200706T084035Z
 - 20200706T150013Z
 - 20200706T204334Z
 - 20200707T024523Z
 - 20200707T084052Z
 - 20200707T145602Z
 - 20200707T204641Z
 - 20200708T024852Z
 - 20200708T084958Z
 - 20200708T150020Z
 - 20200708T204754Z
 - 20200709T030336Z
 - 20200709T084659Z
 - 20200709T145656Z
 - 20200709T205112Z
 - 20200710T025442Z
 - 20200710T084954Z
 - 20200710T145850Z
 - 20200710T204617Z
 - 20200711T025138Z
 - 20200711T085025Z
 - 20200711T145126Z
 - 20200711T211030Z
 - 20200712T025308Z
 - 20200712T084752Z
 - 20200712T145349Z
 - 20200712T205255Z
 - 20200713T025537Z
 - 20200713T085630Z
 - 20200713T150707Z
 - 20200713T205332Z
 - 20200714T030043Z
 - 20200714T084941Z
 - 20200714T145540Z
 - 20200714T205750Z
 - 20200715T025352Z
 - 20200715T085052Z
 - 20200715T145921Z
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 - 20200716T025032Z
 - 20200716T084809Z
 - 20200716T145301Z
 - 20200716T205809Z
 - 20200717T024746Z
 - 20200717T090305Z
 - 20200717T145552Z
 - 20200717T204551Z
 - 20200718T024633Z
 - 20200718T085446Z
 - 20200718T112641Z
 - 20200718T144753Z
 - 20200718T204913Z
 - 20200719T025248Z
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 - 20200720T085850Z
 - 20200720T145623Z
 - 20200720T204543Z
 - 20200721T024628Z
 - 20200721T084125Z
 - 20200721T145337Z
 - 20200721T204601Z
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 - 20200722T085037Z
 - 20200722T145119Z
 - 20200722T205315Z
 - 20200723T030638Z
 - 20200723T090455Z
 - 20200723T150421Z
 - 20200723T205848Z
 - 20200724T030632Z
 - 20200724T085624Z
 - 20200724T150140Z
 - 20200724T205937Z
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 - 20200725T090115Z
 - 20200725T145725Z
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 - 20200731T150517Z
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### 2020-08

 - 20200801T030228Z
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 - 20200818T204716Z
 - 20200819T024947Z
 - 20200819T085445Z
 - 20200819T150205Z
 - 20200819T205636Z
 - 20200820T025116Z
 - 20200820T084555Z
 - 20200820T205846Z
 - 20200821T084144Z
 - 20200821T144650Z
 - 20200821T204110Z
 - 20200822T024046Z
 - 20200822T083851Z
 - 20200822T153015Z
 - 20200822T204040Z
 - 20200823T023935Z
 - 20200823T083950Z
 - 20200823T144624Z
 - 20200823T204307Z
 - 20200824T024034Z
 - 20200824T085146Z
 - 20200824T144416Z
 - 20200824T210020Z
 - 20200825T024524Z
 - 20200825T084820Z
 - 20200825T144439Z
 - 20200825T203037Z
 - 20200826T023518Z
 - 20200826T083950Z
 - 20200826T144410Z
 - 20200826T203932Z
 - 20200827T024539Z
 - 20200827T084011Z
 - 20200827T145438Z
 - 20200827T204935Z
 - 20200828T024534Z
 - 20200828T083857Z
 - 20200828T144133Z
 - 20200828T204858Z
 - 20200829T023814Z
 - 20200829T084349Z
 - 20200829T144457Z
 - 20200829T205244Z
 - 20200830T030719Z
 - 20200830T084341Z
 - 20200830T144254Z
 - 20200830T205348Z
 - 20200831T084335Z
 - 20200831T204953Z

### 2020-09

 - 20200901T030541Z
 - 20200901T091018Z
 - 20200901T150453Z
 - 20200901T204646Z
 - 20200902T024322Z
 - 20200902T084056Z
 - 20200902T144444Z
 - 20200902T205143Z
 - 20200903T024116Z
 - 20200903T084506Z
 - 20200903T144630Z
 - 20200903T205123Z
 - 20200904T024331Z
 - 20200904T084319Z
 - 20200904T145418Z
 - 20200904T205740Z
 - 20200905T024739Z
 - 20200905T084418Z
 - 20200905T143953Z
 - 20200905T205501Z
 - 20200905T232123Z
 - 20200906T025314Z
 - 20200906T084315Z
 - 20200906T144345Z
 - 20200906T205632Z
 - 20200907T024953Z
 - 20200907T084101Z
 - 20200907T144157Z
 - 20200907T204912Z
 - 20200908T024605Z
 - 20200908T084219Z
 - 20200908T144848Z
 - 20200908T204820Z
 - 20200909T024557Z
 - 20200909T083954Z
 - 20200909T144301Z
 - 20200909T203954Z
 - 20200910T024127Z
 - 20200910T083916Z
 - 20200910T144906Z
 - 20200910T204851Z
 - 20200911T025220Z
 - 20200911T084331Z
 - 20200911T151230Z
 - 20200911T205121Z
 - 20200912T024009Z
 - 20200912T083724Z
 - 20200912T143954Z
 - 20200912T204657Z
 - 20200913T025203Z
 - 20200913T084633Z
 - 20200913T144519Z
 - 20200913T204208Z
 - 20200914T024052Z
 - 20200914T084139Z
 - 20200914T145359Z
 - 20200914T205536Z
 - 20200915T025819Z
 - 20200915T084655Z
 - 20200915T145111Z
 - 20200915T204304Z
 - 20200916T024129Z
 - 20200916T084220Z
 - 20200916T145125Z
 - 20200916T204907Z
 - 20200917T025622Z
 - 20200917T084540Z
 - 20200917T150130Z
 - 20200917T205821Z
 - 20200918T030830Z
 - 20200918T090055Z
 - 20200918T150908Z
 - 20200918T210532Z
 - 20200919T025616Z
 - 20200919T085932Z
 - 20200919T145926Z
 - 20200919T211111Z
 - 20200920T030154Z
 - 20200920T085437Z
 - 20200920T150342Z
 - 20200920T205828Z
 - 20200921T024757Z
 - 20200921T085333Z
 - 20200921T150740Z
 - 20200921T205322Z
 - 20200922T024745Z
 - 20200922T084040Z
 - 20200922T144413Z
 - 20200922T204208Z
 - 20200923T030305Z
 - 20200923T085943Z
 - 20200923T150238Z
 - 20200923T205505Z
 - 20200924T025115Z
 - 20200924T084650Z
 - 20200924T150137Z
 - 20200924T205254Z
 - 20200925T030050Z
 - 20200925T085656Z
 - 20200925T205109Z
 - 20200926T035837Z
 - 20200926T104248Z
 - 20200926T151724Z
 - 20200926T180000Z
 - 20200926T204738Z
 - 20200927T024201Z
 - 20200927T083842Z
 - 20200927T144412Z
 - 20200927T204254Z
 - 20200928T030607Z
 - 20200928T091912Z
 - 20200928T150544Z
 - 20200928T210258Z
 - 20200929T025235Z
 - 20200929T085118Z
 - 20200929T154717Z
 - 20200929T210132Z
 - 20200930T025032Z
 - 20200930T084026Z
 - 20200930T144429Z
 - 20200930T204132Z

### 2020-10

 - 20201001T025258Z
 - 20201001T084136Z
 - 20201001T155124Z
 - 20201001T204536Z
 - 20201002T024723Z
 - 20201002T083935Z
 - 20201002T144451Z
 - 20201002T204243Z
 - 20201003T024855Z
 - 20201003T084422Z
 - 20201003T144430Z
 - 20201003T204015Z
 - 20201004T023959Z
 - 20201004T083822Z
 - 20201004T144316Z
 - 20201004T204429Z
 - 20201005T024053Z
 - 20201005T084025Z
 - 20201005T145221Z
 - 20201005T204733Z
 - 20201006T024631Z
 - 20201006T083840Z
 - 20201006T144713Z
 - 20201006T204618Z
 - 20201007T024252Z
 - 20201007T083851Z
 - 20201007T144719Z
 - 20201007T210024Z
 - 20201008T030904Z
 - 20201008T084908Z
 - 20201008T150049Z
 - 20201008T205817Z
 - 20201009T025942Z
 - 20201009T085215Z
 - 20201009T150112Z
 - 20201009T210056Z
 - 20201010T025528Z
 - 20201010T084257Z
 - 20201010T145103Z
 - 20201010T205029Z
 - 20201011T024935Z
 - 20201011T084029Z
 - 20201011T150209Z
 - 20201011T210159Z
 - 20201012T025140Z
 - 20201012T084255Z
 - 20201012T150222Z
 - 20201012T205102Z
 - 20201013T024640Z
 - 20201013T085123Z
 - 20201013T145646Z
 - 20201013T210019Z
 - 20201014T025836Z
 - 20201014T085833Z
 - 20201014T150244Z
 - 20201014T211806Z
 - 20201015T025841Z
 - 20201015T090243Z
 - 20201015T150652Z
 - 20201015T205944Z
 - 20201016T031348Z
 - 20201016T090631Z
 - 20201016T150844Z
 - 20201016T205404Z
 - 20201017T030052Z
 - 20201017T085355Z
 - 20201017T145736Z
 - 20201017T210541Z
 - 20201018T033146Z
 - 20201018T090104Z
 - 20201018T145944Z
 - 20201018T210253Z
 - 20201019T030413Z
 - 20201019T084920Z
 - 20201019T150133Z
 - 20201019T210931Z
 - 20201020T025816Z
 - 20201020T085102Z
 - 20201020T145249Z
 - 20201020T205111Z
 - 20201021T025929Z
 - 20201021T090044Z
 - 20201021T155324Z
 - 20201021T204749Z
 - 20201022T024854Z
 - 20201022T085040Z
 - 20201022T144626Z
 - 20201022T204202Z
 - 20201023T024255Z
 - 20201023T084203Z
 - 20201023T144437Z
 - 20201023T204818Z
 - 20201024T024246Z
 - 20201024T083840Z
 - 20201024T150941Z
 - 20201024T204108Z
 - 20201025T025053Z
 - 20201025T084012Z
 - 20201025T145033Z
 - 20201025T204528Z
 - 20201026T024334Z
 - 20201026T084254Z
 - 20201026T144910Z
 - 20201026T204913Z
 - 20201027T025240Z
 - 20201027T084513Z
 - 20201027T145139Z
 - 20201027T204457Z
 - 20201028T033542Z
 - 20201028T084125Z
 - 20201028T144900Z
 - 20201028T204821Z
 - 20201029T024201Z
 - 20201029T084118Z
 - 20201029T144417Z
 - 20201029T205129Z
 - 20201030T034218Z
 - 20201030T085516Z
 - 20201030T145744Z
 - 20201030T214408Z
 - 20201031T030321Z
 - 20201031T095640Z
 - 20201031T145638Z
 - 20201031T220724Z

### 2020-11

 - 20201101T025945Z
 - 20201101T085706Z
 - 20201101T154040Z
 - 20201101T210343Z
 - 20201102T030717Z
 - 20201102T091602Z
 - 20201102T151620Z
 - 20201102T211720Z
 - 20201103T031014Z
 - 20201103T091314Z
 - 20201103T151140Z
 - 20201103T210717Z
 - 20201104T030458Z
 - 20201104T090812Z
 - 20201104T145852Z
 - 20201104T213038Z
 - 20201105T032615Z
 - 20201105T220209Z
 - 20201106T031653Z
 - 20201106T091348Z
 - 20201106T145202Z
 - 20201106T203710Z
 - 20201107T032125Z
 - 20201107T093238Z
 - 20201107T153551Z
 - 20201107T210144Z
 - 20201108T033050Z
 - 20201108T083920Z
 - 20201108T155128Z
 - 20201108T211009Z
 - 20201109T031347Z
 - 20201109T092230Z
 - 20201109T151315Z
 - 20201109T211859Z
 - 20201110T025914Z
 - 20201110T093021Z
 - 20201110T155742Z
 - 20201110T213014Z
 - 20201111T032645Z
 - 20201111T093740Z
 - 20201111T152747Z
 - 20201111T205648Z
 - 20201112T030858Z
 - 20201112T093810Z
 - 20201112T152245Z
 - 20201112T205220Z
 - 20201113T032242Z
 - 20201113T093438Z
 - 20201113T152700Z
 - 20201113T211832Z
 - 20201114T032438Z
 - 20201114T093457Z
 - 20201114T145245Z
 - 20201114T204702Z
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 - 20201116T031537Z
 - 20201116T092020Z
 - 20201116T150139Z
 - 20201116T210129Z
 - 20201117T032431Z
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 - 20201117T152525Z
 - 20201117T212138Z
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 - 20201118T152053Z
 - 20201118T213453Z
 - 20201119T034213Z
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 - 20201122T094144Z
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 - 20201122T211103Z
 - 20201123T030316Z
 - 20201123T091712Z
 - 20201123T152838Z
 - 20201123T212042Z
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 - 20201124T092301Z
 - 20201124T152634Z
 - 20201124T212647Z
 - 20201125T025457Z
 - 20201125T090621Z
 - 20201125T152047Z
 - 20201125T210657Z
 - 20201126T031821Z
 - 20201126T092837Z
 - 20201126T153155Z
 - 20201126T211843Z
 - 20201127T034359Z
 - 20201127T092959Z
 - 20201127T145929Z
 - 20201127T213225Z
 - 20201128T032015Z
 - 20201128T091257Z
 - 20201128T150015Z
 - 20201128T214105Z
 - 20201129T031845Z
 - 20201129T094855Z
 - 20201129T151654Z
 - 20201129T210217Z
 - 20201130T032709Z
 - 20201130T085609Z
 - 20201130T145246Z
 - 20201130T213631Z

### 2020-12

 - 20201201T031901Z
 - 20201201T091156Z
 - 20201201T153653Z
 - 20201201T205219Z
 - 20201202T024856Z
 - 20201202T093117Z
 - 20201202T151734Z
 - 20201202T205335Z
 - 20201203T025823Z
 - 20201203T092240Z


## Results

It wasn't needed to go further once the following was established:

    OK=20200410T084926Z
    KO=20200411T143911Z

The winner, determined by diffing the `MANIFEST.udebs-$TIMESTAMP` for
both, is:

    libpango1.0-udeb 1.42.4-8 amd64
    libpango1.0-udeb 1.44.7-3 amd64

Attachment: signature.asc
Description: PGP signature

Reply to:

References:
- Bug#987377: rescue-mode: when in graphical mode, locks up one prompt before the shell
  - From: Philip Hands <phil@hands.com>
- Bug#987377: rescue-mode: when in graphical mode, locks up one prompt before the shell
  - From: Philip Hands <phil@hands.com>
- Bug#987377: rescue-mode: when in graphical mode, locks up one prompt before the shell
  - From: Steve McIntyre <steve@einval.com>
- Bug#987377: rescue-mode: when in graphical mode, locks up one prompt before the shell
  - From: Philip Hands <phil@hands.com>
- Bug#987377: rescue-mode: when in graphical mode, locks up one prompt before the shell
  - From: Cyril Brulebois <kibi@debian.org>
- Bug#987377: rescue-mode: when in graphical mode, locks up one prompt before the shell
  - From: Cyril Brulebois <kibi@debian.org>

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