Base de données des produits

7A Bridge Instability ​

Motherboards that uses the 7A2000 bridge chip to provide PCIe interface are known to be unstable with certain peripherals (especially AMD graphics cards based on the GCN 1.0 - 4.0 architectures). Users of these graphics cards may see driver instabilities, graphical glitches, application crashes, or even lock ups. The cause behind this issue is yet to be confirmed.

At present, some Linux distros includes workarounds for this issue, which improves the situation significantly, but we still see occasional user complaints.

If you have ran into situations like this, improving cooling on the bridge chip is also known to lessen the symptom.

USB Devices Lost on Startup ​

Some users reported that their USB keyboards and mice may stop working after system startup, and repeated plugging in/out may be needed before they function again.

According to investigation by an engineer at Loongson Technology, this was caused by a hardware flaw in the Loongson 7A2000 bridge chip. A workaround for this issue has been included since Linux 6.15-rc1, commercial distros based on the Linux 6.6 (ABI20.) or 4.19 (ABI1.0) kernels also include this workaround.

Absence de mise à jour du micrologiciel ​

D'après les commentaires des utilisateurs, cette carte mère bénéficie de peu de mises à jour du micrologiciel et présente plusieurs bogues connus :

• Les premières versions du micrologiciel ne proposaient pas la possibilité de désactiver l'émulation x86 UEFI GOP pour les cartes graphiques, ce qui rendait inutilisables les cartes graphiques AMD récentes (série RX 5000 et supérieures) ainsi que les cartes graphiques discrètes Intel.
• Certaines versions du micrologiciel ne transmettent pas de signal d'affichage depuis les cartes graphiques dédiées, tandis que la sortie HDMI intégrée (7A2000) n'affiche qu'un curseur.

Source : Goofish