My brightness used to work normally until I did bunch of things I don't know which caused the problem. The brightness from keyboard shows me the indicator on screen but doesn't change, from settings doesn't change either.
What I did before I had the problem was :
First, I updated my system.
Second, I ran:
rm -rfv dontDeleteMe && mkdir dontDeleteMe
rm -rf dontDeleteMe && mkdir dontDeleteMe
hoping to reverse it.
Then tried this answer to repair a
sudo lspci -v -s 00:02.0
00:02.0 VGA compatible controller: Intel Corporation Core Processor Integrated Graphics Controller (rev 02) (prog-if 00 [VGA controller]) DeviceName: 32 Subsystem: Hewlett-Packard Company Core Processor Integrated Graphics Controller Flags: bus master, fast devsel, latency 0, IRQ 30 Memory at d0000000 (64-bit, non-prefetchable) [size=4M] Memory at c0000000 (64-bit, prefetchable) [size=256M] I/O ports at 4050 [size=8] [virtual] Expansion ROM at 000c0000 [disabled] [size=128K] Capabilities:  MSI: Enable+ Count=1/1 Maskable- 64bit- Capabilities: [d0] Power Management version 2 Capabilities: [a4] PCI Advanced Features Kernel driver in use: i915 Kernel modules: i915
sudo lshw -class display
*-display description: VGA compatible controller product: Core Processor Integrated Graphics Controller vendor: Intel Corporation physical id: 2 bus info: pci@0000:00:02.0 version: 02 width: 64 bits clock: 33MHz capabilities: msi pm vga_controller bus_master cap_list rom configuration: driver=i915 latency=0 resources: irq:30 memory:d0000000-d03fffff memory:c0000000-cfffffff ioport:4050(size=8) memory:c0000-dffff
Now, What did I do to cause my problem and how can I reverse it?