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Bug#1123591: reportbug: Kernel 6.17.11 "ixgbe"-driver broken (OEM Intel X540-AT2 card)

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On Tue, Jan 20, 2026 at 11:30:59PM +0200, Radostin Dimitrov wrote:
> Starting a "fresh" / cleaner mail loop, since it gets far longer and harder
> for everyone to track, hope you don't mind. Dunno what happened - but I did
> send requested logs, on the very same day they were requested. Attaching
> these once again.

The dmesg still has

	[    7.412563] nvidia: loading out-of-tree module taints kernel.

. Can you please blacklist this driver for further tests?

Looking at the code, there is:

        /* read fwsm.ext_err_ind register and log errors */
        fwsm = IXGBE_READ_REG(hw, IXGBE_FWSM(hw));

        /* skip if E610's FW is reloading, warning in that case may be misleading */
        if (fwsm & IXGBE_FWSM_EXT_ERR_IND_MASK ||
            (!(fwsm & IXGBE_FWSM_FW_VAL_BIT) && !(hw->mac.type == ixgbe_mac_e610)))
                e_dev_warn("Warning firmware error detected FWSM: 0x%08X\n",
                           fwsm);

I think the diagnosis is wrong, the value read is 0xffffffff which in
other code locations is interpreted as IXGBE_FAILED_READ_REG.

Can you please: 

 a) check the issue also occurs without the nvidia (and other tainting
    modules) loaded. Try adding `module_blacklist=nvidia` to the kernel
    commandline. (If the problem doesn't reproduce without the nvidia
    module, stop here. Then it seems the nvidia code is the culprit and
    we cannot do anything for you.)

 b) You wrote Debian 13 wasn't affected. Can you please install kernels
    from https://snapshot.debian.org/ between 6.12 and 6.17 and check
    which is the newest kernel still working and the oldest being
    broken? Do the working kernels also report things like:

	[    0.265544] pci 0000:01:00.0: VF BAR 2 [mem size 0x10000000 64bit pref]: can't assign; no space

    ?

Best regards
Uwe

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Bug#1123591: reportbug: Kernel 6.17.11 "ixgbe"-driver broken (OEM Intel X540-AT2 card) Uwe Kleine-König <ukleinek@debian.org> - 2026-01-21 16:50 +0100

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