Brightness and sleep don't work after update

Hi! I recently switched to linux59 and I’ve started to notice that my laptop isn’t waking up from sleep (my keyboard lights up, but the screen remains black) and that my screen brightness controls have stopped working (I get the pop up whenever I adjust the brightness, but it doesn’t seem to have any effect). This only seems to happen when I’m using linux59 (I tried to replicate it with linux54 and linux58 unsuccessfully), so I’m guessing it has something to do with that.
I’m a bit new to manjaro, so I’d greatly appreciate any help.

Here’s the output from inxy -Fazy:

  Kernel: 5.9.8-2-MANJARO x86_64 bits: 64 compiler: gcc v: 10.2.0 
  parameters: BOOT_IMAGE=/boot/vmlinuz-5.9-x86_64 
  root=UUID=e9c9fb12-ffc1-41ca-aa43-3fc96f3990dd rw quiet apparmor=1 
  security=apparmor resume=UUID=3fde0643-e8fe-4d07-9fa0-b1c90a6aadc2 
  Desktop: KDE Plasma 5.20.3 tk: Qt 5.15.1 info: latte-dock wm: kwin_x11 
  dm: SDDM Distro: Manjaro Linux 
  Type: Convertible System: LENOVO product: 81CU v: Lenovo YOGA 730-15IKB 
  serial: <filter> Chassis: type: 31 v: Lenovo YOGA 730-15IKB serial: <filter> 
  Mobo: LENOVO model: LNVNB161216 v: SDK0R32862 WIN serial: <filter> 
  UEFI: LENOVO v: 7KCN30WW(V1.11) date: 05/24/2019 
  ID-1: BAT1 charge: 38.8 Wh condition: 41.0/51.6 Wh (79%) volts: 12.9/11.2 
  model: 0x43 0x65 0x6C 0x78 0x70 0x65 0x PABAS0241231 type: Li-ion 
  serial: <filter> status: Charging 
  Info: Quad Core model: Intel Core i7-8550U bits: 64 type: MT MCP 
  arch: Kaby Lake family: 6 model-id: 8E (142) stepping: A (10) microcode: E0 
  L2 cache: 8192 KiB 
  flags: avx avx2 lm nx pae sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx 
  bogomips: 32012 
  Speed: 624 MHz min/max: 400/4000 MHz Core speeds (MHz): 1: 700 2: 700 3: 700 
  4: 700 5: 700 6: 700 7: 700 8: 700 
  Vulnerabilities: Type: itlb_multihit status: KVM: VMX disabled 
  Type: l1tf 
  mitigation: PTE Inversion; VMX: conditional cache flushes, SMT vulnerable 
  Type: mds mitigation: Clear CPU buffers; SMT vulnerable 
  Type: meltdown mitigation: PTI 
  Type: spec_store_bypass 
  mitigation: Speculative Store Bypass disabled via prctl and seccomp 
  Type: spectre_v1 
  mitigation: usercopy/swapgs barriers and __user pointer sanitization 
  Type: spectre_v2 mitigation: Full generic retpoline, IBPB: conditional, 
  IBRS_FW, STIBP: conditional, RSB filling 
  Type: srbds mitigation: Microcode 
  Type: tsx_async_abort status: Not affected 
  Device-1: Intel UHD Graphics 620 vendor: Lenovo driver: i915 v: kernel 
  bus ID: 00:02.0 chip ID: 8086:5917 
  Device-2: NVIDIA GP107M [GeForce GTX 1050 Mobile] vendor: Lenovo 
  driver: nvidia v: 450.80.02 alternate: nouveau,nvidia_drm bus ID: 3b:00.0 
  chip ID: 10de:1c8d 
  Device-3: Chicony Integrated Camera type: USB driver: uvcvideo bus ID: 1-5:3 
  chip ID: 04f2:b61e serial: <filter> 
  Display: x11 server: X.Org 1.20.9 compositor: kwin_x11 
  driver: modesetting,nvidia alternate: fbdev,intel,nouveau,nv,vesa 
  display ID: :0 screens: 1 
  Screen-1: 0 s-res: 3840x2160 s-dpi: 192 s-size: 508x285mm (20.0x11.2") 
  s-diag: 582mm (22.9") 
  Monitor-1: eDP-1 res: 3840x2160 dpi: 283 size: 345x194mm (13.6x7.6") 
  diag: 396mm (15.6") 
  OpenGL: renderer: Mesa Intel UHD Graphics 620 (KBL GT2) v: 4.6 Mesa 20.2.2 
  direct render: Yes 
  Device-1: Intel Sunrise Point-LP HD Audio vendor: Lenovo 
  driver: snd_hda_intel v: kernel alternate: snd_soc_skl bus ID: 00:1f.3 
  chip ID: 8086:9d71 
  Sound Server: ALSA v: k5.9.8-2-MANJARO 
  Device-1: Realtek RTL8822BE 802.11a/b/g/n/ac WiFi adapter 
  vendor: Lenovo ThinkPad E595 driver: rtw_8822be v: N/A modules: rtw88_8822be 
  port: 4000 bus ID: 3a:00.0 chip ID: 10ec:b822 
  IF: wlp58s0 state: up mac: <filter> 
  Device-2: ASIX AX88179 Gigabit Ethernet type: USB driver: ax88179_178a 
  bus ID: 2-1.3:4 chip ID: 0b95:1790 serial: <filter> 
  IF: enp0s20f0u1u3 state: down mac: <filter> 
  Local Storage: total: 2.29 TiB used: 183.30 GiB (7.8%) 
  SMART Message: Unable to run smartctl. Root privileges required. 
  ID-1: /dev/nvme0n1 vendor: Samsung model: MZVLB512HAJQ-000L2 
  size: 476.94 GiB block size: physical: 512 B logical: 512 B speed: 31.6 Gb/s 
  lanes: 4 serial: <filter> rev: 5L1QEXA7 scheme: GPT 
  ID-2: /dev/sda type: USB vendor: Western Digital model: WD My Passport 25E1 
  size: 1.82 TiB block size: physical: 512 B logical: 512 B serial: <filter> 
  rev: 1021 scheme: GPT 
  ID-1: / raw size: 459.74 GiB size: 451.52 GiB (98.21%) 
  used: 183.30 GiB (40.6%) fs: ext4 dev: /dev/nvme0n1p2 
  Kernel: swappiness: 60 (default) cache pressure: 100 (default) 
  ID-1: swap-1 type: partition size: 16.90 GiB used: 0 KiB (0.0%) priority: -2 
  dev: /dev/nvme0n1p3 
  System Temperatures: cpu: 42.5 C mobo: N/A 
  Fan Speeds (RPM): N/A 
  Processes: 245 Uptime: 3m Memory: 15.36 GiB used: 2.30 GiB (14.9%) 
  Init: systemd v: 246 Compilers: gcc: 10.2.0 clang: 11.0.0 Packages: 
  pacman: 1472 lib: 419 flatpak: 0 Shell: Zsh v: 5.8 running in: kitty 
  inxi: 3.1.08


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I have been using Manjaro for a little while now and I am seeing a lot of problems with upgrading and kernel upgrades above the LTS. The newest kernel 5.9.10 and the first one before it 5.9.8? sleep does not work for me. If you put it to sleep or it does itself after time, my screen opens to black and the only thing I could do was it ctrl-alt-delete, maybe. it would shut down. or I just had to hold the power button for 10 seconds to kill it and then restart. It is unusable. I had to go back to the LTS 5.4.x kernel and that works.

other problems I have had with newer kernels are that suspend does not even suspend. I close the lid and the system keeps running. I have had my laptop get extremely hot which also seems to be a kernel version issue.

I generally like to upgrade when they come, but I find that is just not safe with Manjaro.

If you upgraded a kernel and need to back out/change the one used you can add or remove kernels
in Manjaro Settings, pick kernels. then install/remove

then to set your boot up defaults; install and run: grub-customizer