Différences

Ci-dessous, les différences entre deux révisions de la page.

--- lenovo_legion_5_15arh05 [2026/04/28 19:47] – [Voir ou convertir des images au format .heic] Benjamin Labomedia
+++ lenovo_legion_5_15arh05 [2026/09/18 20:46] (Version actuelle) – [Convertir un fichier pdf en images et reconstituer un fichier pdf à partir de ces images] Benjamin Labomedia
@@ Ligne 277: / Ligne 277: @@
   apt-get clean
   apt-get autoremove
+==== Convertir un fichier pdf en images et reconstituer un fichier pdf à partir de ces images ====
+  pdftoppm -r 96 -png monficher.pdf page
+  sudo apt install img2pdf
+  img2pdf page-*.png -o resultat.pdf
+==== Firefox freeze sur la lecture de vidéos en plein écran ====
+Try this sequence; NVIDIA + Firefox freezes are often caused by the video-decoding or compositor path rather than the website itself.
+. **Confirm whether hardware acceleration is the cause**
+Open Firefox → `about:preferences` → **General** → **Performance**:
+- Uncheck **Use recommended performance settings**
+- Uncheck **Use hardware acceleration when available**
+- Restart Firefox
+Test the same video. Mozilla recommends this as a diagnostic step for graphics-driver-related playback problems. <citation src="8,10"></citation>
+If playback is stable afterward, leave acceleration disabled temporarily and continue with the driver/VA-API checks below.
+. **Check Firefox’s graphics and media status**
+Open:
+```text
+about:support
+```
+Check these sections:
+- **Window Protocol** — whether you are using `wayland` or `x11`
+- **Compositing**
+- **Hardware Video Decoding**
+- **Video Acceleration Information**
+- **Decision Log**
+Also test Firefox without extensions:
+```bash
+firefox --safe-mode
+```
+If the freeze disappears, disable extensions—especially video downloaders, ad blockers, and codec-related extensions—until you identify the cause. Extensions and content blockers can interfere with media playback. <citation src="8"></citation>
+. **Update the NVIDIA stack**
+On Debian, make sure the kernel module, user-space libraries, and firmware are from compatible packages:
+```bash
+sudo apt update
+sudo apt full-upgrade
+sudo reboot
+```
+Then check:
+```bash
+nvidia-smi
+firefox --version
+uname -r
+```
+If `nvidia-smi` fails, fix the NVIDIA driver installation before troubleshooting Firefox. Avoid mixing NVIDIA packages from different Debian releases or random `.run` installers.
+. **Test the display protocol**
+If you are currently using Wayland, test an X11 session from the login screen. If you are using X11, test Wayland.
+You can also test Firefox explicitly:
+```bash
+MOZ_ENABLE_WAYLAND=1 firefox
+```
+or, for X11:
+```bash
+MOZ_X11_EGL=1 firefox
+```
+If the freeze occurs only under Wayland, it is likely in the NVIDIA GBM/DRM/compositor path. If it occurs only under X11, keep testing with the Wayland path instead.
+. **Check NVIDIA VA-API support**
+Firefox uses VA-API for browser video acceleration. Debian notes that proprietary NVIDIA drivers need the third-party `nvidia-vaapi-driver`; VDPAU is not supported by Firefox. <citation src="11,12"></citation>
+Install the available package:
+```bash
+sudo apt install nvidia-vaapi-driver vainfo
+```
+Then test:
+```bash
+vainfo
+```
+If `vainfo` cannot initialize or shows no decode profiles, hardware video decoding is not correctly configured. The package may be unavailable on older Debian releases; in that case, use the corresponding package from your Debian release/backports rather than installing a mismatched binary.
+. **Try Firefox’s VA-API setting**
+In `about:config`, set:
+```text
+media.ffmpeg.vaapi.enabled = true
+```
+Restart Firefox and check `about:support` again. Debian documents this preference for Firefox VA-API acceleration. <citation src="12"></citation>
+Do not force every codec to hardware-decode initially. In particular, setting `media.ffvpx.enabled=false` can make playback worse if your GPU does not support the selected VP8/VP9 codec.
+. **Test AV1**
+Some NVIDIA GPUs or driver combinations have problems with AV1 playback. Temporarily set:
+```text
+media.av1.enabled = false
+```
+Restart Firefox and test YouTube again. Debian specifically recommends disabling AV1 when the GPU cannot decode it reliably, allowing sites to fall back to H.264 or VP9. <citation src="12"></citation>
+. **Collect useful logs if it still freezes**
+Run Firefox from a terminal:
+```bash
+LIBVA_DRIVER_NAME=nvidia LIBVA_MESSAGING_LEVEL=1 firefox
+```
+For NVIDIA GPU activity, in another terminal run:
+```bash
+watch -n 1 nvidia-smi
+```
+If the entire desktop locks up rather than only the video frame, after reboot check:
+```bash
+journalctl -b -1 -k | grep -Ei 'nvrm|xid|gpu|drm|oom'
+```
+An `NVRM: Xid` error points to an NVIDIA driver/GPU reset, not a normal Firefox media setting.
+The quickest practical workaround is usually: **disable Firefox hardware acceleration, switch between Wayland and X11, update the NVIDIA packages, then re-enable acceleration only after `about:support` shows working video decoding.**