The upper bar is there at first, then simply disappears after some time (like two seconds).

Sorry for the low quality. If you know how to take screenshots in LightDM, please tell me.
As you can see, there is no upper bar and everything is shifted upwards by one cm (more or less). Also, there is a black bar at the bottom of the monitor.
Maybe one minute later, the upper bar comes back.

It may look like I have moved the mouse cursor, actually I did not.
It does not happen when I log out, for instance. As far as I can tell, only Suspend triggers this behavior.
This is a fresh install, I don't think Quick System Info is going to be very helpful. Also, I am pretty sure I can easily reproduce this on a VM.
But here you go.
Code: Select all
System: Host: <filter> Kernel: 4.19.0-12-amd64 x86_64 bits: 64 compiler: gcc v: 8.3.0
parameters: BOOT_IMAGE=/boot/vmlinuz-4.19.0-12-amd64
root=UUID=<filter> ro quiet splash
Desktop: Xfce 4.14.2 tk: Gtk 3.24.5 info: xfce4-panel wm: xfwm4 dm: LightDM 1.26.0
Distro: MX-19.3_x64 patito feo November 11 2020 base: Debian GNU/Linux 10 (buster)
Machine: Type: Laptop System: Acer product: Aspire 5742G v: V1.30 serial: <filter>
Mobo: Acer model: Aspire 5742G v: V1.30 serial: <filter> BIOS: Acer v: 1.30
date: 08/13/2012
CPU: Topology: Dual Core model: Intel Core i3 M 380 bits: 64 type: MT MCP arch: Nehalem
family: 6 model-id: 25 (37) stepping: 5 microcode: 7 L2 cache: 3072 KiB
flags: lm nx pae sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx bogomips: 20218
Speed: 1178 MHz min/max: 933/2533 MHz Core speeds (MHz): 1: 1255 2: 1157 3: 1205
4: 1088
Vulnerabilities: Type: itlb_multihit status: KVM: Split huge pages
Type: l1tf mitigation: PTE Inversion; VMX: conditional cache flushes, SMT vulnerable
Type: mds
status: Vulnerable: Clear CPU buffers attempted, no microcode; 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 status: Not affected
Type: tsx_async_abort status: Not affected
Graphics: Device-1: Intel Core Processor Integrated Graphics vendor: Acer Incorporated ALI
driver: i915 v: kernel bus ID: 00:02.0 chip ID: 8086:0046
Device-2: NVIDIA GF108M [GeForce GT 540M] vendor: Acer Incorporated ALI driver: N/A
bus ID: 01:00.0 chip ID: 10de:0df4
Display: x11 server: X.Org 1.20.4 driver: intel resolution: 1366x768~60Hz
OpenGL: renderer: Mesa DRI Intel Ironlake Mobile v: 2.1 Mesa 18.3.6
direct render: Yes
Audio: Device-1: Intel 5 Series/3400 Series High Definition Audio
vendor: Acer Incorporated ALI driver: snd_hda_intel v: kernel bus ID: 00:1b.0
chip ID: 8086:3b56
Device-2: NVIDIA GF108 High Definition Audio driver: snd_hda_intel v: kernel
bus ID: 01:00.1 chip ID: 10de:0bea
Sound Server: ALSA v: k4.19.0-12-amd64
Network: Device-1: Broadcom Limited NetLink BCM57780 Gigabit Ethernet PCIe
vendor: Acer Incorporated ALI driver: tg3 v: 3.137 port: 3000 bus ID: 02:00.0
chip ID: 14e4:1692
IF: eth0 state: down mac: <filter>
Device-2: Qualcomm Atheros AR9287 Wireless Network Adapter vendor: Foxconn T77H167.00
driver: ath9k v: kernel port: 3000 bus ID: 03:00.0 chip ID: 168c:002e
IF: wlan0 state: up mac: <filter>
Drives: Local Storage: total: 472.99 GiB used: 6.27 GiB (1.3%)
ID-1: /dev/sda vendor: Crucial model: CT500MX500SSD1 size: 465.76 GiB block size:
physical: 4096 B logical: 512 B speed: 3.0 Gb/s serial: <filter> rev: 023 scheme: MBR
ID-2: /dev/sdb type: USB vendor: Kingston model: DataTraveler 2.0 size: 7.22 GiB
block size: physical: 512 B logical: 512 B serial: <filter> rev: 1.00 scheme: MBR
Partition: ID-1: / raw size: 262.08 GiB size: 256.97 GiB (98.05%) used: 6.27 GiB (2.4%) fs: ext4
dev: /dev/sda3
ID-2: swap-1 size: 3.00 GiB used: 0 KiB (0.0%) fs: swap swappiness: 15 (default 60)
cache pressure: 100 (default) dev: /dev/sda4
Sensors: System Temperatures: cpu: 57.0 C mobo: N/A
Fan Speeds (RPM): N/A
Repos: No active apt repos in: /etc/apt/sources.list
Active apt repos in: /etc/apt/sources.list.d/debian-stable-updates.list
1: deb http://deb.debian.org/debian buster-updates main contrib non-free
Active apt repos in: /etc/apt/sources.list.d/debian.list
1: deb http://deb.debian.org/debian buster main contrib non-free
2: deb http://deb.debian.org/debian-security buster/updates main contrib non-free
Active apt repos in: /etc/apt/sources.list.d/mx.list
1: deb http://it.mxrepo.com/mx/repo/ buster main non-free
No active apt repos in: /etc/apt/sources.list.d/various.list
Info: Processes: 208 Uptime: 34m Memory: 7.47 GiB used: 1.24 GiB (16.6%) Init: SysVinit
v: 2.93 runlevel: 5 default: 5 Compilers: gcc: 8.3.0 alt: 8 Shell: quick-system-in
running in: quick-system-in inxi: 3.0.36