20.04 Non rileva piu' il display Intel

Dopo un aggiornamento (reinstall nautilus) alla partenza il sistema non sembra piu' in grado di rilevare il tipo di schermo in automatico e va in low-resolution da cui non si riesce piu' ad avere neanche una shell. Dopo esser ripartito in recovery mode riesco a entrare in failsafeX, e, dopo un uteriore passaggio riesco ad aprire una shell, loggarmi e dare startx. Cosi' X parte, ma non ho opzioni dello schermo (ad esempio la luminosita' e' al massimo) e comunque, anche provando diversi xorg.conf, non riesco a far partire il sistema senza fare tutto questo giro.

Qui sotto le linee significative di /var/log/Xorg.0.log

[ 41.221] X.Org X Server 1.20.9 X Protocol Version 11, Revision 0 [ 41.222] Build Operating System: Linux 4.15.0-130-generic x86_64 Ubuntu [ 41.222] Current Operating System: Linux pc-bonarini 5.4.0-70-generic #78-Ubuntu SMP Fri Mar 19 13:29:52 UTC 2021 x86_64 [ 41.222] Kernel command line: BOOT_IMAGE=/boot/vmlinuz-5.4.0-70-generic root=UUID=0db16900-e9f1-49a7-b5db-508d231aac23 ro recovery nomodeset dis_ucode_ldr [ 41.222] Build Date: 17 January 2021 09:13:31AM [ 41.222] xorg-server 2:1.20.9-2ubuntu1.2~20.04.1 (For technical support please see http://www.ubuntu.com/support) [ 41.222] Current version of pixman: 0.38.4 ... [ 41.228] (II) LoadModule: "intel" [ 41.228] (II) Loading /usr/lib/xorg/modules/drivers/intel_drv.so [ 41.231] (II) Module intel: vendor="X.Org Foundation" [ 41.231] compiled for 1.20.8, module version = 2.99.917 [ 41.231] Module class: X.Org Video Driver [ 41.231] ABI class: X.Org Video Driver, version 24.1 [ 41.231] (II) intel: Driver for Intel(R) Integrated Graphics Chipsets: i810, i810-dc100, i810e, i815, i830M, 845G, 854, 852GM/855GM, 865G, 915G, E7221 (i915), 915GM, 945G, 945GM, 945GME, Pineview GM, Pineview G, 965G, G35, 965Q, 946GZ, 965GM, 965GME/GLE, G33, Q35, Q33, GM45, 4 Series, G45/G43, Q45/Q43, G41, B43 [ 41.231] (II) intel: Driver for Intel(R) HD Graphics [ 41.231] (II) intel: Driver for Intel(R) Iris(TM) Graphics [ 41.231] (II) intel: Driver for Intel(R) Iris(TM) Pro Graphics [ 43.243] intel: waited 2020 ms for i915.ko driver to load [ 45.258] intel: waited 2020 ms for i915.ko driver to load [ 45.260] (EE) No devices detected. [ 45.260] (==) Matched modesetting as autoconfigured driver 0 [ 45.260] (==) Matched fbdev as autoconfigured driver 1 [ 45.260] (==) Matched vesa as autoconfigured driver 2 [ 45.260] (==) Assigned the driver to the xf86ConfigLayout .... [ 45.262] (II) intel: Driver for Intel(R) Integrated Graphics Chipsets: i810, i810-dc100, i810e, i815, i830M, 845G, 854, 852GM/855GM, 865G, 915G, E7221 (i915), 915GM, 945G, 945GM, 945GME, Pineview GM, Pineview G, 965G, G35, 965Q, 946GZ, 965GM, 965GME/GLE, G33, Q35, Q33, GM45, 4 Series, G45/G43, Q45/Q43, G41, B43 [ 45.262] (II) intel: Driver for Intel(R) HD Graphics [ 45.262] (II) intel: Driver for Intel(R) Iris(TM) Graphics [ 45.262] (II) intel: Driver for Intel(R) Iris(TM) Pro Graphics [ 45.262] (II) modesetting: Driver for Modesetting Kernel Drivers: kms [ 45.262] (II) FBDEV: driver for framebuffer: fbdev [ 45.262] (II) VESA: driver for VESA chipsets: vesa [ 45.262] (EE) open /dev/dri/card0: No such file or directory [ 45.262] (WW) Falling back to old probe method for modesetting [ 45.262] (EE) open /dev/dri/card0: No such file or directory ...

Qui la configurazione del sistema

:sudo inxi -FZ > ~/Documents/Z-Help/AAAMyConfiguration.txt

System: Host: pc-bonarini Kernel: 5.4.0-70-generic x86_64 bits: 64 Console: N/A Distro: Ubuntu 20.04.2 LTS (Focal Fossa) Machine: Type: Laptop System: Dell product: Latitude 5480 v: N/A serial: 19S23H2 Mobo: Dell model: 0NDFXD v: A00 serial: /19S23H2/CN1296375H0226/ UEFI: Dell v: 1.17.1 date: 01/07/2020 Battery: ID-1: BAT0 charge: 62.2 Wh condition: 62.2/68.0 Wh (91%) CPU: Topology: Dual Core model: Intel Core i5-7200U bits: 64 type: MT MCP L2 cache: 3072 KiB Speed: 800 MHz min/max: 400/3100 MHz Core speeds (MHz): 1: 800 2: 800 3: 800 4: 800 Graphics: Device-1: Intel HD Graphics 620 driver: N/A Display: server: X.Org 1.20.9 driver: fbdev unloaded: modesetting,vesa resolution: 1366x768~76Hz OpenGL: renderer: llvmpipe (LLVM 11.0.0 256 bits) v: 4.5 Mesa 20.2.6 Audio: Device-1: Intel Sunrise Point-LP HD Audio driver: snd_hda_intel Sound Server: ALSA v: k5.4.0-70-generic Network: Device-1: Intel Ethernet I219-LM driver: e1000e IF: enp0s31f6 state: down mac: d4:81:d7:d4:01:0e Device-2: Intel Wireless 8265 / 8275 driver: iwlwifi IF: wlp2s0 state: up mac: 00:28:f8:fd:79:79 Drives: Local Storage: total: 465.76 GiB used: 760.05 GiB (163.2%) ID-1: /dev/sda vendor: Samsung model: SSD 850 EVO 500GB size: 465.76 GiB RAID: Hardware-1: Intel 82801 Mobile SATA Controller [RAID mode] driver: ahci Partition: ID-1: / size: 442.22 GiB used: 380.01 GiB (85.9%) fs: ext4 dev: /dev/sda2 ID-2: swap-1 size: 15.87 GiB used: 0 KiB (0.0%) fs: swap dev: /dev/sda3 Sensors: System Temperatures: cpu: 41.0 C mobo: N/A Fan Speeds (RPM): cpu: 0 Info: Processes: 254 Uptime: 27m Memory: 15.50 GiB used: 1.66 GiB (10.7%) Shell: bash inxi: 3.0.38

Grazie!