I am using MX Linux 19 32-bit on my Fujitsu Siemens computer from 2003. Everything seems to work, but there is one big problem.
When my computer has been inactive for 10 minutes, the screen saver activates (blue squares). When I wait for another 5 minutes, the monitor goes into standby mode. That is normal. But, when I move my cursor again, my screen doesn't always recover. Sometimes, I get my screen back and I can continue working like I did, but sometimes, the screen becomes white and I only see my cursor. I can move my cursor and I can click on everything. I just don't see what I am clicking on. Whatever button I press, the screen remains white. The only option to continue from here is for me to forcefully shut down the desktop environment with Ctrl + Alt + Backspace. XFCE restarts and I can see everything again, but all applications that I had running are gone, meaning that I lose unsaved work this way.
The annoying this is: I cannot reproduce this error at will, since this only occurs sometimes. Sometimes, I come back to my computer after an hour and the screen displays normally. Sometimes, I come back after 15 minutes and I get the white screen. I cannot properly diagnose where things go wrong when the error occurs so randomly and inconsistently, but it does occurs, sometimes, when the screen saver is on or when the screen goes in standby mode.
I have never had this problem when running MX Linux 18 XFCE on this same PC.
I also didn't have this problem when signing in into the Fluxbox session instead of the XFCE one. I tried. Fluxbox always recovers from the screen saver or screen standby mode. This suggests that this could be an XFCE problem, but I cannot be sure. Maybe I was just being lucky when using Fluxbox?
Either way, this is very annoying behaviour. I want a reliable PC where I can safely prepare myself some meal and come back instead of having to fear that I will get the white screen.
Does any of you know how to solve this? Any help is greatly appreciated!

This is my quick system information:
Code: Select all
System: Kernel: 4.19.0-25-686-pae i686 bits: 32 compiler: gcc v: 8.3.0
parameters: BOOT_IMAGE=/boot/vmlinuz-4.19.0-25-686-pae
root=UUID=<filter> ro quiet splash
Desktop: Xfce 4.14.2 tk: Gtk 3.24.5 info: xfce4-panel wm: xfwm 4.14.0 vt: 7
dm: LightDM 1.26.0 Distro: MX-19.4_386 patito feo March 31 2021
base: Debian GNU/Linux 10 (buster)
Machine: Type: Desktop System: FUJITSU SIEMENS product: SCENIC E v: N/A serial: <filter>
Chassis: type: 6 v: SCEE serial: <filter>
Mobo: FUJITSU SIEMENS model: D1534 v: S26361-D1534 serial: <filter>
BIOS: FUJITSU SIEMENS // Phoenix v: 5.00 R2.16.1534.01 date: 04/01/2005
CPU: Info: Single Core model: Intel Pentium 4 bits: 32 type: MCP arch: Netburst Smithfield
family: F (15) model-id: 4 stepping: 1 microcode: 17 cache: L2: 1024 KiB
flags: pae sse sse2 sse3 bogomips: 5585
Speed: 2793 MHz min/max: N/A Core speed (MHz): 1: 2793
Vulnerabilities: Type: gather_data_sampling status: Not affected
Type: itlb_multihit status: KVM: Vulnerable
Type: l1tf mitigation: PTE Inversion
Type: mds status: Vulnerable: Clear CPU buffers attempted, no microcode; SMT disabled
Type: meltdown mitigation: PTI
Type: mmio_stale_data status: Unknown: No mitigations
Type: retbleed status: Not affected
Type: spec_store_bypass status: Vulnerable
Type: spectre_v1 mitigation: usercopy/swapgs barriers and __user pointer sanitization
Type: spectre_v2
mitigation: Retpolines, STIBP: disabled, RSB filling, PBRSB-eIBRS: Not affected
Type: srbds status: Not affected
Type: tsx_async_abort status: Not affected
Graphics: Device-1: Intel 82865G Integrated Graphics
vendor: Fujitsu Solutions Fujitsu-Siemens Scenic E300 i865GV driver: i915 v: kernel
bus-ID: 00:02.0 chip-ID: 8086:2572 class-ID: 0300
Display: x11 server: X.Org 1.20.4 compositor: xfwm4 v: 4.14.0 driver: loaded: intel
unloaded: fbdev,modesetting,vesa display-ID: :0.0 screens: 1
Screen-1: 0 s-res: 1440x900 s-dpi: 96 s-size: 380x238mm (15.0x9.4")
s-diag: 448mm (17.7")
Monitor-1: VGA1 res: 1440x900 hz: 60 dpi: 89 size: 410x260mm (16.1x10.2")
diag: 485mm (19.1")
OpenGL: renderer: Mesa DRI Intel 865G x86/MMX/SSE2 v: 1.3 Mesa 18.3.6
direct render: Yes
Audio: Device-1: Intel 82801EB/ER AC97 Audio vendor: Fujitsu Solutions driver: snd_intel8x0
v: kernel bus-ID: 00:1f.5 chip-ID: 8086:24d5 class-ID: 0401
Sound Server-1: ALSA v: k4.19.0-25-686-pae running: yes
Sound Server-2: PulseAudio v: 12.2 running: yes
Network: Device-1: Intel 82547EI Gigabit Ethernet vendor: Fujitsu Solutions driver: e1000
v: 7.3.21-k8-NAPI port: 4000 bus-ID: 02:01.0 chip-ID: 8086:1019 class-ID: 0200
IF: eth0 state: down mac: <filter>
Device-2: Broadcom Limited BCM4306 802.11b/g Wireless LAN
vendor: Belkin F5D7001 v1000 driver: b43-pci-bridge v: N/A modules: ssb,wl port: 4000
bus-ID: 03:07.0 chip-ID: 14e4:4320 class-ID: 0280
Device-3: Sitecom Europe B.V. type: USB driver: r8188eu bus-ID: 2-2:3
chip-ID: 0df6:0076 class-ID: 0000 serial: <filter>
IF: wlan1 state: up mac: <filter>
IF-ID-1: wlan0 state: up mac: <filter>
Drives: Local Storage: total: 247.69 GiB used: 34.88 GiB (14.1%)
SMART Message: Unable to run smartctl. Root privileges required.
ID-1: /dev/sda maj-min: 8:0 vendor: Maxtor model: 6L200P0 size: 189.92 GiB
block-size: physical: 512 B logical: 512 B speed: <unknown> type: N/A
serial: <filter> rev: 1G10 scheme: MBR
ID-2: /dev/sdb maj-min: 8:16 type: USB model: USB DISK 2.0 size: 57.77 GiB
block-size: physical: 512 B logical: 512 B type: N/A serial: <filter> rev: PMAP
scheme: MBR
SMART Message: Unknown USB bridge. Flash drive/Unsupported enclosure?
Partition: ID-1: / raw-size: 77.92 GiB size: 76.15 GiB (97.72%) used: 34.8 GiB (45.7%) fs: ext4
dev: /dev/sda2 maj-min: 8:2
Swap: Kernel: swappiness: 15 (default 60) cache-pressure: 100 (default)
ID-1: swap-1 type: partition size: 2 GiB used: 80.2 MiB (3.9%) priority: -2
dev: /dev/sda3 maj-min: 8:3
Sensors: System Temperatures: cpu: 59.0 C mobo: 35.0 C
Fan Speeds (RPM): fan-1: 1320 fan-2: 1860
Power: 12v: 11.79 5v: 5.05 3.3v: N/A vbat: 0.91
Repos: Packages: note: see --pkg apt: 2143 lib: 1086
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://nl.mxrepo.com/mx/repo/ buster main non-free
No active apt repos in: /etc/apt/sources.list.d/various.list
Info: Processes: 167 Uptime: 26m wakeups: 1 Memory: 993.7 MiB used: 796.7 MiB (80.2%)
Init: SysVinit v: 2.93 runlevel: 5 default: 5 tool: systemctl Compilers: gcc: 8.3.0
alt: 8 clang: 7.0.1-8+deb10u2 Shell: quick-system-in default: Bash v: 5.0.3
running-in: quick-system-in inxi: 3.3.06