Hi, I hope you’re alright. This is my first post, I’ve been using Windows my whole life so I’m pretty new in Linux universe.
I sometimes connect a second screen to my laptop. I want the same panel to show in both displays, so I went to Panel preferences > Panel 0 > Display > Output , and the options are Automatic, Primary, eDP-1 (that’s the laptop’s screen) and HDMI-1 (that’s my second monitor). There’s no option for “both”. A “span monitors” option does exist; although it doesn’t work anymore, it used to extend the panel to the second monitor, but this extension was just a black bar without any buttons. I want the same panel with the same buttons on both screens. Creating a second panel with the exact same properties as Panel 0 is not possible, since some plugins can’t be on more than one panel (like the clock).
So I tried going to /home/pachu/.config/xfce4/xfconf/xfce-perchannel-xml/xfce4-panel.xml and editing that file (that’s pretty much the same as changing xfce panel preferences in Settings Editor, am I right?). The 14th line goes as follows:
<property name="output-name" type="string" value="Primary"/>
If I change “primary” here for something else like “both” or “eDP-1;HDMI-1” it won’t work, I believe that’s because these values are not recognized by the program as valid ones (sorry, my knowledge about programming is close to zero). So, I think I should edit something that looks like if output name=both print in eDP-1 and print in HDMI-1, but I’m just lost. I believe that kind of information is in the binary files of the program, but I don’t know how to change that (is that programming?). So, my questions are: Am I near the solution? How should I proceed? Or, is there a newbie-friendly way to solve this problem?
English is not my first language so this might be poorly written: sorry if that’s the case. Thanks in advance for your answers, I’ll leave with my inxi output 
System:
Kernel: 5.10.42-1-MANJARO x86_64 bits: 64 compiler: gcc v: 11.1.0
parameters: BOOT_IMAGE=/boot/vmlinuz-5.10-x86_64
root=UUID=98037f08-e81d-413e-be62-b4c2f7b6f0ac rw quiet udev.log_priority=3
Desktop: Xfce 4.16.0 tk: Gtk 3.24.29 info: xfce4-panel wm: xfwm4 vt: 7
dm: LightDM 1.30.0 Distro: Manjaro Linux base: Arch Linux
Machine:
Type: Laptop System: ASUSTeK product: X510UQ v: 1.0 serial: <filter>
Mobo: ASUSTeK model: X510UQ v: 1.0 serial: <filter>
UEFI: American Megatrends v: X510UQ.310 date: 04/19/2019
Battery:
ID-1: BAT0 charge: 8.9 Wh (27.6%) condition: 32.2/42.1 Wh (76.4%)
volts: 11.5 min: 11.5 model: ASUSTeK ASUS Battery type: Li-ion serial: N/A
status: Discharging cycles: 175
Memory:
RAM: total: 7.66 GiB used: 2.45 GiB (31.9%)
RAM Report: permissions: Unable to run dmidecode. Root privileges required.
CPU:
Info: Dual Core model: Intel Core i7-7500U bits: 64 type: MT MCP
arch: Amber/Kaby Lake note: check family: 6 model-id: 8E (142) stepping: 9
microcode: DE cache: L2: 4 MiB bogomips: 23209
Speed: 600 MHz min/max: 400/3500 MHz Core speeds (MHz): 1: 600 2: 600 3: 600
4: 600
Flags: 3dnowprefetch abm acpi adx aes aperfmperf apic arat arch_perfmon art
avx avx2 bmi1 bmi2 bts clflush clflushopt cmov constant_tsc cpuid
cpuid_fault cx16 cx8 de ds_cpl dtes64 dtherm dts epb ept ept_ad erms est
f16c flexpriority flush_l1d fma fpu fsgsbase fxsr ht hwp hwp_act_window
hwp_epp hwp_notify ibpb ibrs ida intel_pt invpcid invpcid_single lahf_lm lm
mca mce md_clear mmx monitor movbe mpx msr mtrr nonstop_tsc nopl nx pae pat
pbe pcid pclmulqdq pdcm pdpe1gb pebs pge pln pni popcnt pse pse36 pti pts
rdrand rdseed rdtscp rep_good sdbg sep smap smep ss ssbd sse sse2 sse4_1
sse4_2 ssse3 stibp syscall tm tm2 tpr_shadow tsc tsc_adjust
tsc_deadline_timer vme vmx vnmi vpid x2apic xgetbv1 xsave xsavec xsaveopt
xsaves xtopology xtpr
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
Graphics:
Device-1: Intel HD Graphics 620 vendor: ASUSTeK driver: i915 v: kernel
bus-ID: 00:02.0 chip-ID: 8086:5916 class-ID: 0300
Device-2: NVIDIA GM108M [GeForce 940MX] vendor: ASUSTeK driver: nvidia
v: 465.31 alternate: nouveau,nvidia_drm bus-ID: 01:00.0 chip-ID: 10de:134d
class-ID: 0302
Device-3: IMC Networks VGA UVC WebCam type: USB driver: uvcvideo
bus-ID: 1-6:2 chip-ID: 13d3:5a07 class-ID: 0e02 serial: <filter>
Display: x11 server: X.Org 1.20.11 driver: loaded: modesetting,nvidia
unloaded: intel,nouveau alternate: fbdev,nv,vesa display-ID: :0.0 screens: 1
Screen-1: 0 s-res: 3286x1080 s-dpi: 96 s-size: 869x286mm (34.2x11.3")
s-diag: 915mm (36")
OpenGL: renderer: Mesa Intel HD Graphics 620 (KBL GT2) v: 4.6 Mesa 21.1.2
direct render: Yes
Audio:
Device-1: Intel Sunrise Point-LP HD Audio vendor: ASUSTeK
driver: snd_hda_intel v: kernel alternate: snd_soc_skl bus-ID: 00:1f.3
chip-ID: 8086:9d71 class-ID: 0403
Sound Server-1: ALSA v: k5.10.42-1-MANJARO running: yes
Sound Server-2: JACK v: 0.125.0 running: no
Sound Server-3: PulseAudio v: 14.2 running: yes
Sound Server-4: PipeWire v: 0.3.30 running: no
Network:
Device-1: Intel Wireless 8265 / 8275 driver: iwlwifi v: kernel port: e000
bus-ID: 02:00.0 chip-ID: 8086:24fd class-ID: 0280
IF: wlp2s0 state: up mac: <filter>
IP v4: <filter> type: dynamic noprefixroute scope: global
broadcast: <filter>
IP v6: <filter> type: noprefixroute scope: link
WAN IP: <filter>
Bluetooth:
Device-1: Intel Bluetooth wireless interface type: USB driver: btusb v: 0.8
bus-ID: 1-8:3 chip-ID: 8087:0a2b class-ID: e001
Report: rfkill ID: hci0 rfk-id: 1 state: down bt-service: enabled,running
rfk-block: hardware: no software: yes address: see --recommends
Logical:
Permissions: Unable to run lvs. Root privileges required.
RAID:
Message: No RAID data found.
Drives:
Local Storage: total: 931.51 GiB used: 16.73 GiB (1.8%)
SMART Message: Required tool smartctl not installed. Check --recommends
ID-1: /dev/sda maj-min: 8:0 vendor: Seagate model: ST1000LM035-1RK172
size: 931.51 GiB block-size: physical: 4096 B logical: 512 B speed: 6.0 Gb/s
rotation: 5400 rpm serial: <filter> rev: SDM1 scheme: GPT
Message: No optical or floppy data found.
Partition:
ID-1: / raw-size: 333.29 GiB size: 327 GiB (98.11%) used: 16.69 GiB (5.1%)
fs: ext4 dev: /dev/sda5 maj-min: 8:5 label: N/A
uuid: 98037f08-e81d-413e-be62-b4c2f7b6f0ac
ID-2: /boot/efi raw-size: 260 MiB size: 256 MiB (98.46%)
used: 36.8 MiB (14.4%) fs: vfat dev: /dev/sda1 maj-min: 8:1 label: SYSTEM
uuid: 080C-3EF9
Swap:
Alert: No swap data was found.
Unmounted:
ID-1: /dev/sda2 maj-min: 8:2 size: 16 MiB fs: <superuser required>
label: N/A uuid: N/A
ID-2: /dev/sda3 maj-min: 8:3 size: 597.17 GiB fs: <superuser required>
label: OS uuid: 76DA111FDA10DD65
ID-3: /dev/sda4 maj-min: 8:4 size: 800 MiB fs: <superuser required>
label: RECOVERY uuid: 421E52221E520EF3
USB:
Hub-1: 1-0:1 info: Full speed (or root) Hub ports: 12 rev: 2.0
speed: 480 Mb/s chip-ID: 1d6b:0002 class-ID: 0900
Device-1: 1-6:2 info: IMC Networks VGA UVC WebCam type: Video
driver: uvcvideo interfaces: 2 rev: 2.0 speed: 480 Mb/s power: 500mA
chip-ID: 13d3:5a07 class-ID: 0e02 serial: <filter>
Device-2: 1-8:3 info: Intel Bluetooth wireless interface type: Bluetooth
driver: btusb interfaces: 2 rev: 2.0 speed: 12 Mb/s power: 100mA
chip-ID: 8087:0a2b class-ID: e001
Hub-2: 2-0:1 info: Full speed (or root) Hub ports: 6 rev: 3.0 speed: 5 Gb/s
chip-ID: 1d6b:0003 class-ID: 0900
Sensors:
System Temperatures: cpu: 43.0 C mobo: N/A
Fan Speeds (RPM): cpu: 2500
Info:
Processes: 215 Uptime: 3h 23m wakeups: 6 Init: systemd v: 248
tool: systemctl Compilers: gcc: 11.1.0 clang: 12.0.0 Packages: pacman: 1183
lib: 324 Shell: Bash v: 5.1.8 running-in: xfce4-terminal inxi: 3.3.04```