[SOLVED] [Wayland] LO Impress fuzzy rendering after any animation

bgmeulem · 2026-05-12 10:08:11

My LibreOffice Impress shows fuzzy text and images, but only under these specific conditions:
- It is in slideshow view (i.e. the fullscreen view)
- A slide has been advanced, or it otherwise requires an animation to be visible

The first slide in slideshow view (be it the actual first slide, or wherever you started the slide show from) has perfectly fine and sharp text+images, so LO is able to render them fine, even in slideshow view.
After advancing to the next slide, text and PNGs are fuzzy. Going back to the original slide shows fuzzy text+images as well, even though it was crisp before.

In short: every time an image or text becomes visible after an animation/slide advance it is fuzzy.
Only objects that are immediately visible on the slide (i.e. don't have an entry animation) are sharp.

Text (any font), PNG and TIF file formats are affected. SVG is not affected. Built-in shapes are not affected (e.g. arrows, squares etc).
General UI looks sharp and OK, slide edit view looks fine. Slide thumbnails look fuzzy too, but I didn't give that too much attention.

I can live with fuzzy thumbnails, but the main preview should look crisp, as it is the thing you'll be showing people.
Haven't tested yet on external display.

❯ pacman -Qs libreoffice
local/libcdr 0.1.8-4
    CorelDraw file format importer library for LibreOffice
local/libreoffice-fresh 26.2.3-1
    LibreOffice branch which contains new features and program enhancements
❯ pacman -Q wayland
wayland 1.25.0-1

Last edited by bgmeulem (2026-05-12 10:57:49)

bgmeulem · 2026-05-12 10:57:30

The issue does not present itself with hardware acceleration turned off.
Ideally, hardware-accelerated rendering should not produce fuzzy objects, but I'm going to mark as solved as my original issue is resolved.

For completeness, I have the following CPU (no dedicated GPU - it's a 13" laptop):

❯ lscpu
Architecture:                x86_64
  CPU op-mode(s):            32-bit, 64-bit
  Address sizes:             48 bits physical, 48 bits virtual
  Byte Order:                Little Endian
CPU(s):                      12
  On-line CPU(s) list:       0-11
Vendor ID:                   AuthenticAMD
  Model name:                AMD Ryzen 5 7640U w/ Radeon 760M Graphics
    CPU family:              25
    Model:                   116
    Thread(s) per core:      2
    Core(s) per socket:      6
    Socket(s):               1
    Stepping:                1
    Microcode version:       0xa704108
    Frequency boost:         enabled
    CPU(s) scaling MHz:      37%
    CPU max MHz:             4972.4351
    CPU min MHz:             405.9140
    BogoMIPS:                6987.06
    Flags:                   fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht sys
                             call nx mmxext fxsr_opt pdpe1gb rdtscp lm constant_tsc rep_good amd_lbr_v2 nopl xtopology nonstop_tsc cp
                             uid extd_apicid aperfmperf rapl pni pclmulqdq monitor ssse3 fma cx16 sse4_1 sse4_2 x2apic movbe popcnt a
                             es xsave avx f16c rdrand lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch o
                             svw ibs skinit wdt tce topoext perfctr_core perfctr_nb bpext perfctr_llc mwaitx cpuid_fault cpb cat_l3 c
                             dp_l3 hw_pstate ssbd mba perfmon_v2 ibrs ibpb stibp ibrs_enhanced vmmcall fsgsbase bmi1 avx2 smep bmi2 e
                             rms invpcid cqm rdt_a avx512f avx512dq rdseed adx smap avx512ifma clflushopt clwb avx512cd sha_ni avx512
                             bw avx512vl xsaveopt xsavec xgetbv1 xsaves cqm_llc cqm_occup_llc cqm_mbm_total cqm_mbm_local user_shstk 
                             avx512_bf16 clzero irperf xsaveerptr rdpru wbnoinvd cppc arat npt lbrv svm_lock nrip_save tsc_scale vmcb
                             _clean flushbyasid decodeassists pausefilter pfthreshold vgif x2avic v_spec_ctrl vnmi avx512vbmi umip pk
                             u ospke avx512_vbmi2 gfni vaes vpclmulqdq avx512_vnni avx512_bitalg avx512_vpopcntdq rdpid overflow_reco
                             v succor smca fsrm flush_l1d amd_lbr_pmc_freeze
Virtualization features:     
  Virtualization:            AMD-V
Caches (sum of all):         
  L1d:                       192 KiB (6 instances)
  L1i:                       192 KiB (6 instances)
  L2:                        6 MiB (6 instances)
  L3:                        16 MiB (1 instance)
NUMA:                        
  NUMA node(s):              1
  NUMA node0 CPU(s):         0-11
Vulnerabilities:             
  Gather data sampling:      Not affected
  Ghostwrite:                Not affected
  Indirect target selection: Not affected
  Itlb multihit:             Not affected
  L1tf:                      Not affected
  Mds:                       Not affected
  Meltdown:                  Not affected
  Mmio stale data:           Not affected
  Old microcode:             Not affected
  Reg file data sampling:    Not affected
  Retbleed:                  Not affected
  Spec rstack overflow:      Mitigation; Safe RET
  Spec store bypass:         Mitigation; Speculative Store Bypass disabled via prctl
  Spectre v1:                Mitigation; usercopy/swapgs barriers and __user pointer sanitization
  Spectre v2:                Mitigation; Enhanced / Automatic IBRS; IBPB conditional; STIBP always-on; PBRSB-eIBRS Not affected; BHI 
                             Not affected
  Srbds:                     Not affected
  Tsa:                       Mitigation; Clear CPU buffers
  Tsx async abort:           Not affected
  Vmscape:                   Mitigation; IBPB before exit to userspace

seth · 2026-05-12 12:31:09

Text (any font), PNG and TIF file formats are affected. SVG is not affected. Built-in shapes are not affected (e.g. arrows, squares etc).

Same in xwayland mode?
https://wiki.archlinux.org/title/LibreO … _and_HiDPI

What compositor and do you use (fractional) scaling?

Arch Linux

#1 2026-05-12 10:08:11

[SOLVED] [Wayland] LO Impress fuzzy rendering after any animation

#2 2026-05-12 10:57:30

Re: [SOLVED] [Wayland] LO Impress fuzzy rendering after any animation

#3 2026-05-12 12:31:09

Re: [SOLVED] [Wayland] LO Impress fuzzy rendering after any animation

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