Typically it helps to do a rmmod r8169 + modprobe r8169 to work around the BIOS
bug.
Maybe also a PHY soft reset helps to make the PHY behave sanely again.
Can you test whether the following fixes the issue for you?
diff --git a/drivers/net/ethernet/realtek/r8169_main.c
b/drivers/net/ethernet/realtek/r8169_main.c
index 8b665f2ec..9b1ad5d45 100644
--- a/drivers/net/ethernet/realtek/r8169_main.c
+++ b/drivers/net/ethernet/realtek/r8169_main.c
@@ -5104,6 +5104,17 @@ static int r8169_mdio_write_reg(struct mii_bus *mii_bus,
int phyaddr,
return 0;
}
+static void rtl_phy_soft_reset(struct rtl8169_private *tp)
+{
+ int i = 30;
+
+ rtl_writephy(tp, MII_BMCR, BMCR_ANENABLE | BMCR_RESET);
+
+ do {
+ msleep(20);
+ } while (rtl_readphy(tp, MII_BMCR) & BMCR_RESET && --i);
+}
+
static int r8169_mdio_register(struct rtl8169_private *tp)
{
struct pci_dev *pdev = tp->pci_dev;
@@ -5123,6 +5134,11 @@ static int r8169_mdio_register(struct rtl8169_private
*tp)
new_bus->read = r8169_mdio_read_reg;
new_bus->write = r8169_mdio_write_reg;
+ /* A BIOS bug causes few boards to report an invalid PHY ID otherwise */
+ if (tp->mac_version == RTL_GIGA_MAC_VER_25 ||
+ tp->mac_version == RTL_GIGA_MAC_VER_26)
+ rtl_phy_soft_reset(tp);
+
ret = devm_mdiobus_register(new_bus);
if (ret)
return ret;
--
2.26.2
--
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux-signed in Ubuntu.
https://bugs.launchpad.net/bugs/1876593
Title:
Ethernet not working/Realtek RTL8169 fails to load
Status in linux-signed package in Ubuntu:
New
Bug description:
With the latest kernels on Ubuntu 20.04 LTS, my onboard Ethernet has
stopped working.
Last known good kernel: Ubuntu 5.4.0-21.25-generic 5.4.27
Current (bad) kernel: Ubuntu 5.4.0-28.32-generic 5.4.30
Ethernet controller:
03:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd.
RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller [10ec:8168]
(rev 03)
Select lines from dmesg with bad kernel:
[ 1.479172] r8169 0000:03:00.0: realtek.ko not loaded, maybe it needs to
be added to initramfs?
[ 1.498143] r8169: probe of 0000:03:00.0 failed with error -49
With good kernel:
[ 1.472510] r8169 0000:03:00.0 eth0: RTL8168d/8111d, 6c:f0:49:e7:de:a3,
XID 283, IRQ 35
[ 1.472511] r8169 0000:03:00.0 eth0: jumbo features [frames: 9200 bytes,
tx checksumming: ko]
[ 8.430734] r8169 0000:03:00.0 eth0: Link is Down
[ 9.241421] r8169 0000:03:00.0 eth0: Link is Up - 100Mbps/Full - flow
control off
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux-signed/+bug/1876593/+subscriptions
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