ls /sys/bus/acpi/devices/ | grep TOS6205 If present, try loading the driver manually:
acpi=off toshiba_acpi.force=0 Then:
sudo nano /etc/default/grub Add to GRUB_CMDLINE_LINUX_DEFAULT : Driver acpi tos6205 toshiba
Laptop model: Toshiba Satellite Pro C50 / Kernel: 6.1.0 / Distro: Debian 12 ls /sys/bus/acpi/devices/ | grep TOS6205 If present, try
ACPI: Toshiba TOS6205: cannot be enumerated or Driver acpi tos6205 toshiba
If you own a Toshiba laptop (especially older Satellite, Tecra, or Portégé models) and have recently installed Linux, you might have spotted a cryptic error during boot or in dmesg :