diff --git a/README.md b/README.md
index 8bdb3c8b4bb8e097b19709453254f8e762951917..9ababa95f848b148f409d8f467fff0306e3d8315 100644
--- a/README.md
+++ b/README.md
@@ -10,7 +10,8 @@ https://consumer.huawei.com/fr/support/laptops/matebook/
 
 # Screen fickering
 
-*  Add `intel_idle.max_cstate=4` to kernel parameters
+*  Add `intel_idle.max_cstate=4` to kernel parameters to avoid screen fickering
+*  Add line: `blacklist gsmi` to `/etc/modprobe.d/blacklist.conf` or it eventually hang booting (after working fine for some time...)
 
 
 # Need to install :