Hi all, this is my first topic, so please excuse potentially missing details and/or incorrect formatting etc., but please let me know about it, so that I can improve my future posts. 
As the topic already says, when writing random text in mousepad and pressing Ctrl+- several times, the text gets zoomed out (in my case, doing so 3 times leads to the minimum zoom level). After having done so, pressing Ctrl++ has no effect anymore and the text stays unreadably small. The same behavior occurs when using Ctrl+ mouse scroll down and again Ctrl+ mouse scroll up.
More details in brief:
-
mousepadversion affected: 0.5.2 - System default monospace font is set to Liberation Mono Regular 9
- Mousepad is configured to use the system default font
- Switching the default font to DejaVu Sans Mono Book 9 doesn’t change the behavior
My inxi output is as follows:
System:
Kernel: 5.4.100-1-MANJARO x86_64 bits: 64 compiler: gcc v: 10.2.1
parameters: BOOT_IMAGE=/vmlinuz-5.4-x86_64
root=UUID=4389411c-72e7-4cc8-802a-65a01e203354 rw quiet apparmor=1
security=apparmor udev.log_priority=3
Desktop: Xfce 4.16.0 tk: Gtk 3.24.24 info: xfce4-panel wm: xfwm4
dm: LightDM 1.30.0 Distro: Manjaro Linux
Machine:
Type: Laptop System: Hewlett-Packard product: HP EliteBook Folio 9470m
v: A1029D110C serial: <filter> Chassis: type: 10 serial: <filter>
Mobo: Hewlett-Packard model: 18DF v: KBC Version 62.19 serial: <filter>
BIOS: Hewlett-Packard v: 68IBD Ver. F.73 date: 04/12/2019
Memory:
RAM: total: 15.51 GiB used: 2.58 GiB (16.6%)
RAM Report: permissions: Unable to run dmidecode. Root privileges required.
CPU:
Info: Dual Core model: Intel Core i5-3437U bits: 64 type: MT MCP
arch: Ivy Bridge family: 6 model-id: 3A (58) stepping: 9 microcode: 21
L2 cache: 3 MiB bogomips: 19162
Speed: 813 MHz min/max: 800/2900 MHz Core speeds (MHz): 1: 813 2: 798 3: 798
4: 846
Flags: acpi aes aperfmperf apic arat arch_perfmon avx bts clflush cmov
constant_tsc cpuid cpuid_fault cx16 cx8 de ds_cpl dtes64 dtherm dts epb ept
erms est f16c flexpriority flush_l1d fpu fsgsbase fxsr ht ibpb ibrs ida
lahf_lm lm mca mce md_clear mmx monitor msr mtrr nonstop_tsc nopl nx pae pat
pbe pcid pclmulqdq pdcm pebs pge pln pni popcnt pse pse36 pti pts rdrand
rdtscp rep_good sep smep smx ss ssbd sse sse2 sse4_1 sse4_2 ssse3 stibp
syscall tm tm2 tpr_shadow tsc tsc_deadline_timer vme vmx vnmi vpid x2apic
xsave xsaveopt xtopology xtpr
Vulnerabilities: Type: itlb_multihit status: KVM: Split huge pages
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 status: Vulnerable: No microcode
Type: tsx_async_abort status: Not affected
Graphics:
Device-1: Intel 3rd Gen Core processor Graphics vendor: Hewlett-Packard
driver: i915 v: kernel bus ID: 00:02.0 chip ID: 8086:0166 class ID: 0300
Device-2: Cheng Uei Precision Industry (Foxlink) HP HD Webcam [Fixed]
type: USB driver: uvcvideo bus ID: 1-1.3:3 chip ID: 05c8:034b class ID: 0e02
Display: x11 server: X.Org 1.20.10 driver: loaded: intel
unloaded: modesetting alternate: fbdev,vesa display ID: :0.0 screens: 1
Screen-1: 0 s-res: 1920x1080 s-dpi: 96 s-size: 508x285mm (20.0x11.2")
s-diag: 582mm (22.9")
Monitor-1: HDMI3 res: 1920x1080 hz: 60 dpi: 102 size: 480x270mm (18.9x10.6")
diag: 551mm (21.7")
OpenGL: renderer: Mesa DRI Intel HD Graphics 4000 (IVB GT2)
v: 4.2 Mesa 20.3.4 compat-v: 3.0 direct render: Yes
Audio:
Device-1: Intel 7 Series/C216 Family High Definition Audio
vendor: Hewlett-Packard driver: snd_hda_intel v: kernel bus ID: 00:1b.0
chip ID: 8086:1e20 class ID: 0403
Sound Server: ALSA v: k5.4.100-1-MANJARO
Network:
Device-1: Intel 82579LM Gigabit Network vendor: Hewlett-Packard
driver: e1000e v: 3.2.6-k port: 2080 bus ID: 00:19.0 chip ID: 8086:1502
class ID: 0200
IF: enp0s25 state: down mac: <filter>
Device-2: Intel Centrino Advanced-N 6235 driver: iwlwifi v: kernel
port: ef80 bus ID: 03:00.0 chip ID: 8086:088e class ID: 0280
IF: wlo1 state: up mac: <filter>
IP v4: <filter> type: noprefixroute scope: global broadcast: <filter>
IP v6: <filter> type: noprefixroute scope: link
WAN IP: <filter>
Bluetooth:
Device-1: Intel Centrino Bluetooth Wireless Transceiver type: USB
driver: btusb v: 0.8 bus ID: 3-1.6:3 chip ID: 8087:07da class ID: e001
Message: Required tool hciconfig not installed. Check --recommends
RAID:
Message: No RAID data was found.
Drives:
Local Storage: total: 262.7 GiB used: 116.4 GiB (44.3%)
SMART Message: Required tool smartctl not installed. Check --recommends
ID-1: /dev/sda maj-min: 8:0 vendor: Samsung model: MZMPC032HBCD-000H1
size: 29.82 GiB block size: physical: 512 B logical: 512 B speed: 6.0 Gb/s
rotation: SSD serial: <filter> rev: 2H1Q scheme: MBR
ID-2: /dev/sdb maj-min: 8:16 vendor: Samsung model: SSD 840 EVO 250GB
size: 232.89 GiB block size: physical: 512 B logical: 512 B speed: 6.0 Gb/s
rotation: SSD serial: <filter> rev: CB6Q scheme: MBR
Message: No Optical or Floppy data was found.
Partition:
ID-1: / raw size: 150.66 GiB size: 147.29 GiB (97.77%)
used: 111.25 GiB (75.5%) fs: ext4 dev: /dev/sdb7 maj-min: 8:23 label: N/A
uuid: 4389411c-72e7-4cc8-802a-65a01e203354
ID-2: /boot raw size: 1001.4 MiB size: 969.6 MiB (96.83%)
used: 103 MiB (10.6%) fs: ext4 dev: /dev/sdb3 maj-min: 8:19 label: N/A
uuid: c9c2f914-f06c-4365-a03b-356fdf3c0132
ID-3: /mnt/data raw size: 27.34 GiB size: 27.34 GiB (100.00%)
used: 5.05 GiB (18.5%) fs: ntfs dev: /dev/sdb6 maj-min: 8:22 label: data
uuid: 02F8793C795D0C37
Swap:
Kernel: swappiness: 60 (default) cache pressure: 100 (default)
ID-1: swap-1 type: partition size: 29.82 GiB used: 0 KiB (0.0%) priority: -2
dev: /dev/sda1 maj-min: 8:1 label: N/A
uuid: cc4e16f7-ad32-4b4b-bed0-0d9e8a64b4a1
Unmounted:
ID-1: /dev/sdb1 maj-min: 8:17 size: 100 MiB fs: ntfs label: N/A
uuid: 9A5C79CD5C79A4A3
ID-2: /dev/sdb2 maj-min: 8:18 size: 49.9 GiB fs: ntfs label: N/A
uuid: 588E837D8E835304
ID-3: /dev/sdb4 maj-min: 8:20 size: 1 KiB fs: <superuser required>
label: N/A uuid: N/A
ID-4: /dev/sdb5 maj-min: 8:21 size: 3.91 GiB fs: swap label: N/A
uuid: 6c184967-56c0-4ed5-b6f3-8c23fc94bf17
USB:
Hub-1: 1-0:1 info: Full speed (or root) Hub ports: 3 rev: 2.0
speed: 480 Mb/s chip ID: 1d6b:0002 class ID: 0900
Hub-2: 1-1:2 info: Intel Integrated Rate Matching Hub ports: 6 rev: 2.0
speed: 480 Mb/s chip ID: 8087:0024 class ID: 0900
Device-1: 1-1.3:3
info: Cheng Uei Precision Industry (Foxlink) HP HD Webcam [Fixed]
type: Video driver: uvcvideo interfaces: 2 rev: 2.0 speed: 480 Mb/s
chip ID: 05c8:034b class ID: 0e02
Hub-3: 2-0:1 info: Full speed (or root) Hub ports: 4 rev: 2.0
speed: 480 Mb/s chip ID: 1d6b:0002 class ID: 0900
Hub-4: 2-2:2 info: Genesys Logic Hub ports: 4 rev: 2.1 speed: 480 Mb/s
chip ID: 05e3:0610 class ID: 0900
Device-1: 2-2.1:3 info: Holtek Keyboard type: Keyboard,HID
driver: hid-generic,usbhid interfaces: 2 rev: 1.1 speed: 1.5 Mb/s
chip ID: 04d9:1503 class ID: 0300
Device-2: 2-2.2:4 info: Logitech Unifying Receiver type: Keyboard,Mouse
driver: logitech-djreceiver,usbhid interfaces: 2 rev: 2.0 speed: 12 Mb/s
chip ID: 046d:c534 class ID: 0301
Hub-5: 3-0:1 info: Full speed (or root) Hub ports: 3 rev: 2.0
speed: 480 Mb/s chip ID: 1d6b:0002 class ID: 0900
Hub-6: 3-1:2 info: Intel Integrated Rate Matching Hub ports: 8 rev: 2.0
speed: 480 Mb/s chip ID: 8087:0024 class ID: 0900
Device-1: 3-1.6:3 info: Intel Centrino Bluetooth Wireless Transceiver
type: Bluetooth driver: btusb interfaces: 2 rev: 2.0 speed: 12 Mb/s
chip ID: 8087:07da class ID: e001
Hub-7: 4-0:1 info: Full speed (or root) Hub ports: 4 rev: 3.0 speed: 5 Gb/s
chip ID: 1d6b:0003 class ID: 0900
Hub-8: 4-2:2 info: Genesys Logic USB3.1 Hub ports: 4 rev: 3.1 speed: 5 Gb/s
chip ID: 05e3:0620 class ID: 0900
Sensors:
System Temperatures: cpu: 54.0 C mobo: 0.0 C
Fan Speeds (RPM): N/A
Info:
Processes: 186 Uptime: 9h 04m wakeups: 3 Init: systemd v: 247 Compilers:
gcc: 10.2.0 Packages: pacman: 1328 lib: 411 flatpak: 0 Shell: Bash v: 5.1.0
running in: xfce4-terminal inxi: 3.3.01
I could reproduce the described behavior on two further installations (1 native, 1 VM) that are based on different installation ISOs (which I can’t name exactly anymore, sorry). The cross-check in a VM with vanilla Arch installation resulted in Arch not having this issue. Did I configure something incorrectly?
[Edit, 2021-03-07]: Added mousepad version affected (-> 0.5.2)
I’ll enhance my post accordingly.
