Всем привет! Послали сюда с телеграм-канала Манджаро-ру. 
После апдейта Манджаро встроенная видяха перестала переключаться на дискретную, в попытках победить методом научнго тыка поставил Бамблби, при установке мне было сказано, что прайм будет удален и изменения вступят в силу после перезагрузки. Соотвественно, после перезагрузки я увидел черный экран. Что и как ставил - не помню, я дикий юзер, ставлю копи-пастой из сети с разных источников (вдруг поможет? :-)) 
После самоличного уничтожения системы начал безрезультатные (пока) попытки восстановления. Что натворил: Через ЧРУТ сделал все опции со страницы mascloud.ru/chroot - не помогло. Удалил видеодрайвера и обратно поставил проприетарный Нвидиа (тоже через ЧРУТ) 
journalctl выдает следующее:
Mar 10 19:14:07 vital-pc plasmashell[1610]: qml: [eventcalendar] upcomingEvents.onAllDataFetched
Mar 10 19:14:07 vital-pc plasmashell[1610]: qml: [eventcalendar] onCalendarFetched plasma_Holidays
Mar 10 19:14:07 vital-pc plasmashell[1610]: qml: [eventcalendar] upcomingEvents.onAllDataFetched
Mar 10 19:14:07 vital-pc plasmashell[1610]: qml: [eventcalendar] upcomingEvents.onAllDataFetched
Mar 10 19:14:20 vital-pc kwin_x11[1607]: qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 56492, resource id: 79691797, major code: 18 (ChangeProperty), minor code: 0
Mar 10 19:14:23 vital-pc gmenudbusmenuproxy[1639]: kde.dbusmenuproxy: Ignoring window 31457334 of type 6
Mar 10 19:14:23 vital-pc plasmashell[1610]: <Unknown File>: QML QQuickLayoutAttached: Binding loop detected for property "preferredHeight"
Mar 10 19:14:27 vital-pc gmenudbusmenuproxy[1639]: kde.dbusmenuproxy: Ignoring window 79691782 of type 5
Mar 10 19:14:29 vital-pc org_kde_powerdevil[1678]: powerdevil: Releasing inhibition with cookie  10
Mar 10 19:14:29 vital-pc org_kde_powerdevil[1678]: powerdevil: Scheduling inhibition from ":1.70" "My SDL application" with cookie 11 and reason "Playing a game"
Mar 10 19:14:29 vital-pc org_kde_powerdevil[1678]: powerdevil: Can't contact ck
Mar 10 19:14:34 vital-pc org_kde_powerdevil[1678]: powerdevil: Enforcing inhibition from ":1.70" "My SDL application" with cookie 11 and reason "Playing a game"
Mar 10 19:14:34 vital-pc org_kde_powerdevil[1678]: powerdevil: Added change screen settings
Mar 10 19:14:34 vital-pc org_kde_powerdevil[1678]: powerdevil: Added interrupt session
Mar 10 19:14:34 vital-pc org_kde_powerdevil[1678]: powerdevil: Can't contact ck
Mar 10 19:14:57 vital-pc kcmshell5[2454]: Wrote script:  "/home/vital/.config/plasma-locale-settings.sh" 
                                           "# Generated script, do not edit\n# Exports language-format specific env vars from startkde.\n# This script has been generated from kcmshell5 formats.\n# It will automatically be overwritten fr>
Mar 10 19:14:57 vital-pc gmenudbusmenuproxy[1639]: kde.dbusmenuproxy: Ignoring window 79692016 of type 5
Mar 10 19:14:59 vital-pc org_kde_powerdevil[1678]: powerdevil: Releasing inhibition with cookie  11
Mar 10 19:14:59 vital-pc org_kde_powerdevil[1678]: powerdevil: Scheduling inhibition from ":1.70" "My SDL application" with cookie 12 and reason "Playing a game"
Mar 10 19:14:59 vital-pc org_kde_powerdevil[1678]: powerdevil: Can't contact ck
Mar 10 19:15:00 vital-pc kwin_x11[1607]: qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 63675, resource id: 79692021, major code: 18 (ChangeProperty), minor code: 0
Mar 10 19:15:04 vital-pc org_kde_powerdevil[1678]: powerdevil: Enforcing inhibition from ":1.70" "My SDL application" with cookie 12 and reason "Playing a game"
Mar 10 19:15:04 vital-pc org_kde_powerdevil[1678]: powerdevil: Added change screen settings
Mar 10 19:15:04 vital-pc org_kde_powerdevil[1678]: powerdevil: Added interrupt session
Mar 10 19:15:04 vital-pc org_kde_powerdevil[1678]: powerdevil: Can't contact ck
Mar 10 19:15:12 vital-pc gmenudbusmenuproxy[1639]: kde.dbusmenuproxy: Ignoring window 31457331 of type 6
Mar 10 19:15:13 vital-pc plasmashell[1610]: trying to show an empty dialog
Mar 10 19:15:13 vital-pc plasmashell[1610]: libpng warning: iCCP: known incorrect sRGB profile
Mar 10 19:15:13 vital-pc gmenudbusmenuproxy[1639]: kde.dbusmenuproxy: Ignoring window 31457678 of type 4
Mar 10 19:15:30 vital-pc org_kde_powerdevil[1678]: powerdevil: Releasing inhibition with cookie  12
Mar 10 19:15:30 vital-pc org_kde_powerdevil[1678]: powerdevil: Scheduling inhibition from ":1.70" "My SDL application" with cookie 13 and reason "Playing a game"
Mar 10 19:15:30 vital-pc org_kde_powerdevil[1678]: powerdevil: Can't contact ck
Mar 10 19:15:32 vital-pc kwin_x11[1607]: qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 4414, resource id: 31457727, major code: 18 (ChangeProperty), minor code: 0
Mar 10 19:15:35 vital-pc org_kde_powerdevil[1678]: powerdevil: Enforcing inhibition from ":1.70" "My SDL application" with cookie 13 and reason "Playing a game"
Mar 10 19:15:35 vital-pc org_kde_powerdevil[1678]: powerdevil: Added change screen settings
Mar 10 19:15:35 vital-pc org_kde_powerdevil[1678]: powerdevil: Added interrupt session
Mar 10 19:15:35 vital-pc org_kde_powerdevil[1678]: powerdevil: Can't contact ck
Mar 10 19:15:57 vital-pc kwin_x11[1607]: qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 9612, resource id: 33559897, major code: 2 (ChangeWindowAttributes), minor code: 0
Mar 10 19:16:00 vital-pc org_kde_powerdevil[1678]: powerdevil: Releasing inhibition with cookie  13
Mar 10 19:16:00 vital-pc org_kde_powerdevil[1678]: powerdevil: Scheduling inhibition from ":1.70" "My SDL application" with cookie 14 and reason "Playing a game"
Mar 10 19:16:00 vital-pc org_kde_powerdevil[1678]: powerdevil: Can't contact ck
Mar 10 19:16:05 vital-pc org_kde_powerdevil[1678]: powerdevil: Enforcing inhibition from ":1.70" "My SDL application" with cookie 14 and reason "Playing a game"
Mar 10 19:16:05 vital-pc org_kde_powerdevil[1678]: powerdevil: Added change screen settings
Mar 10 19:16:05 vital-pc org_kde_powerdevil[1678]: powerdevil: Added interrupt session
Mar 10 19:16:05 vital-pc org_kde_powerdevil[1678]: powerdevil: Can't contact ck
Mar 10 19:16:10 vital-pc gmenudbusmenuproxy[1639]: kde.dbusmenuproxy: Ignoring window 31457331 of type 6
Mar 10 19:16:11 vital-pc plasmashell[1610]: trying to show an empty dialog
Mar 10 19:16:11 vital-pc gmenudbusmenuproxy[1639]: kde.dbusmenuproxy: Ignoring window 31457729 of type 4
Mar 10 19:16:19 vital-pc kwin_x11[1607]: qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 13216, resource id: 31457750, major code: 18 (ChangeProperty), minor code: 0
Mar 10 19:16:31 vital-pc org_kde_powerdevil[1678]: powerdevil: Releasing inhibition with cookie  14
Mar 10 19:16:31 vital-pc org_kde_powerdevil[1678]: powerdevil: Scheduling inhibition from ":1.70" "My SDL application" with cookie 15 and reason "Playing a game"
Mar 10 19:16:31 vital-pc org_kde_powerdevil[1678]: powerdevil: Can't contact ck
Mar 10 19:16:36 vital-pc org_kde_powerdevil[1678]: powerdevil: Enforcing inhibition from ":1.70" "My SDL application" with cookie 15 and reason "Playing a game"
Mar 10 19:16:36 vital-pc org_kde_powerdevil[1678]: powerdevil: Added change screen settings
Mar 10 19:16:36 vital-pc org_kde_powerdevil[1678]: powerdevil: Added interrupt session

Внимание, вопрос: Как победить, если я ничего не соображаю и тыкаю разные методы с разных страниц? :-)