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Ecran non reconu au demarage ensuite oui

bonjour,

j ai un souci de détection d écran et de clavier.
donc je démarre mon pc et il ne détecte pas l écran et le clavier pourtant il tourne
je suis obligé de débranché la prise d alimentation et la remettre ensuite redémarré le pc et la il détecte l écran et le clavier.
ce pc tourne sous mxlinux,il fessait pareil avec une autre distribution linux.
j ai testé le clavier et l écran sur un autre pc tout va nikel.
une idée du souci?
voila la configuration de ce pc
bonne journée

System:    Host: <filter> Kernel: 4.19.0-14-amd64 x86_64 bits: 64 compiler: gcc v: 8.3.0 
           parameters: BOOT_IMAGE=/boot/vmlinuz-4.19.0-14-amd64 
           root=UUID=<filter> ro quiet splash 
           Desktop: Xfce 4.14.2 tk: Gtk 3.24.5 info: xfce4-panel wm: xfwm4 dm: LightDM 1.26.0 
           Distro: MX-19.3_x64 patito feo November 11  2020 base: Debian GNU/Linux 10 (buster) 
Machine:   Type: Desktop Mobo: ASRock model: N68C-S serial: <filter> BIOS: American Megatrends 
           v: P1.30 date: 06/22/2010 
CPU:       Topology: Quad Core model: AMD Phenom 9500 bits: 64 type: MCP arch: K10 
           family: 10 (16) model-id: 2 stepping: 2 microcode: 1000095 L2 cache: 2048 KiB 
           flags: lm nx pae sse sse2 sse3 sse4a svm bogomips: 17680 
           Speed: 1100 MHz min/max: 1100/2200 MHz Core speeds (MHz): 1: 1100 2: 1100 3: 1100 
           4: 1100 
           Vulnerabilities: Type: itlb_multihit status: Not affected 
           Type: l1tf status: Not affected 
           Type: mds status: Not affected 
           Type: meltdown status: Not affected 
           Type: spec_store_bypass status: Not affected 
           Type: spectre_v1 mitigation: usercopy/swapgs barriers and __user pointer sanitization 
           Type: spectre_v2 mitigation: Full AMD retpoline, STIBP: disabled, RSB filling 
           Type: srbds status: Not affected 
           Type: tsx_async_abort status: Not affected 
Graphics:  Device-1: NVIDIA G96 [GeForce 9500 GT] vendor: Micro-Star MSI G96C driver: nvidia 
           v: 340.108 bus ID: 02:00.0 chip ID: 10de:0640 
           Display: x11 server: X.Org 1.20.4 driver: nvidia resolution: 1680x1050~60Hz 
           OpenGL: renderer: GeForce 9500 GT/PCIe/SSE2 v: 3.3.0 NVIDIA 340.108 
           direct render: Yes 
Audio:     Device-1: NVIDIA MCP61 High Definition Audio vendor: ASRock driver: snd_hda_intel 
           v: kernel bus ID: 00:05.0 chip ID: 10de:03f0 
           Sound Server: ALSA v: k4.19.0-14-amd64 
Network:   Device-1: NVIDIA MCP61 Ethernet vendor: ASRock 939NF6G-VSTA Board 
           type: network bridge driver: forcedeth v: kernel port: d480 bus ID: 00:07.0 
           chip ID: 10de:03ef 
           IF: eth0 state: down mac: <filter> 
           Device-2: Ralink RT2561/RT61 rev B 802.11g 
           vendor: D-Link System AirPlus G DWL-G510 Wireless driver: rt61pci v: 2.3.0 port: c000 
           bus ID: 01:08.0 chip ID: 1814:0302 
           IF: wlan0 state: up mac: <filter> 
Drives:    Local Storage: total: 2.11 TiB used: 489.21 GiB (22.6%) 
           ID-1: /dev/sda vendor: Western Digital model: WD20EZRX-00D8PB0 size: 1.82 TiB 
           block size: physical: 4096 B logical: 512 B speed: 3.0 Gb/s rotation: 5400 rpm 
           serial: <filter> rev: 0A80 scheme: MBR 
           ID-2: /dev/sdb vendor: Seagate model: ST3320311CS size: 298.09 GiB block size: 
           physical: 512 B logical: 512 B speed: 3.0 Gb/s rotation: 5900 rpm serial: <filter> 
           rev: CA12 scheme: MBR 
Partition: ID-1: / raw size: 296.06 GiB size: 290.41 GiB (98.09%) used: 9.30 GiB (3.2%) fs: ext4 
           dev: /dev/sdb1 
           ID-2: swap-1 size: 2.00 GiB used: 17.2 MiB (0.8%) fs: swap 
           swappiness: 15 (default 60) cache pressure: 100 (default) dev: /dev/sdb2 
Sensors:   Message: No sensors data was found. Is sensors configured? 
Repos:     No active apt repos in: /etc/apt/sources.list 
           Active apt repos in: /etc/apt/sources.list.d/debian-stable-updates.list 
           1: deb http://deb.debian.org/debian buster-updates main contrib non-free
           Active apt repos in: /etc/apt/sources.list.d/debian.list 
           1: deb http://deb.debian.org/debian buster main contrib non-free
           2: deb http://deb.debian.org/debian-security buster/updates main contrib non-free
           Active apt repos in: /etc/apt/sources.list.d/google-chrome.list 
           1: deb [arch=amd64] http://dl.google.com/linux/chrome/deb/ stable main
           Active apt repos in: /etc/apt/sources.list.d/mx.list 
           1: deb http://mirror.tiguinet.net/mx/packages/mx/repo/ buster main non-free
           Active apt repos in: /etc/apt/sources.list.d/opera-stable.list 
           1: deb https://deb.opera.com/opera-stable/ stable non-free #Opera Browser (final releases)
           No active apt repos in: /etc/apt/sources.list.d/various.list 
Info:      Processes: 223 Uptime: 4h 26m Memory: 3.85 GiB used: 2.17 GiB (56.2%) Init: SysVinit 
           v: 2.93 runlevel: 5 default: 5 Compilers: gcc: 8.3.0 alt: 8 Shell: quick-system-in 
           running in: quick-system-in inxi: 3.0.36 

Bonjour,
Ca signifie qu’il ne mémorise pas à mon avis, je peux me tromper bien sur, les données en partant, ça peut venir du bios, pile, pins mal positionné etc, j’ai déjà eu ça, mais c’était l’alim qui était hs mais sans doute une tension de maintient pas de puissance.