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From: Heiner Kallweit <hkallweit1@gmail.com>
To: Petr Tesarik <ptesarik@suse.cz>,
	Realtek linux nic maintainers <nic_swsd@realtek.com>
Cc: netdev@vger.kernel.org
Subject: Re: RTL8402 stops working after hibernate/resume
Date: Wed, 15 Jul 2020 17:22:35 +0200	[thread overview]
Message-ID: <d742082e-42a1-d904-8a8f-4583944e88e1@gmail.com> (raw)
In-Reply-To: <20200715102820.7207f2f8@ezekiel.suse.cz>

On 15.07.2020 10:28, Petr Tesarik wrote:
> Hi all,
> 
> I've encountered some issues on an Asus laptop. The RTL8402 receive
> queue behaves strangely after suspend to RAM and resume - many incoming
> packets are truncated, but not all and not always to the same length
> (most commonly 60 bytes, but I've also seen 150 bytes and other
> lengths).
> 
> Reloading the driver can fix the problem, so I believe we must be
> missing some initialization on resume. I've already done some
> debugging, and the interface is not running when rtl8169_resume() is
> called, so __rtl8169_resume() is skipped, which means that almost
> nothing is done on resume.
> 
The dmesg log part in the opensuse bug report indicates that a userspace
tool (e.g. NetworkManager) brings down the interface on suspend.
On resume the interface is brought up again, and PHY driver is loaded.
Therefore it's ok that rtl8169_resume() is a no-op.

The bug report mentions that the link was down before suspending.
Does the issue also happen if the link is up when suspending?

Interesting would also be a test w/o a network manager.
Means the interface stays up during suspend/resume cycle.

Unfortunately it's not known whether it's a regression, and I have no
test hw with this chip version.

Also you could test whether the same happens with the r8101 vendor driver.

> Some more information can be found in this openSUSE bug report:
> 
> https://bugzilla.opensuse.org/show_bug.cgi?id=1174098
> 
> The laptop is not (yet) in production, so I can do further debugging if
> needed.
> 
> Petr T
> 
Heiner

  reply	other threads:[~2020-07-15 15:22 UTC|newest]

Thread overview: 34+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-07-15  8:28 RTL8402 stops working after hibernate/resume Petr Tesarik
2020-07-15 15:22 ` Heiner Kallweit [this message]
2020-07-16  8:58   ` Petr Tesarik
2020-07-18 12:07     ` Heiner Kallweit
2020-09-03  8:41       ` Petr Tesarik
2020-09-17 14:10         ` Petr Tesarik
2020-09-23  9:57         ` Heiner Kallweit
2020-09-24 19:14           ` Petr Tesarik
2020-09-24 19:37             ` Heiner Kallweit
2020-09-24 20:12             ` Heiner Kallweit
2020-09-25  7:30               ` Petr Tesarik
2020-09-25  8:54                 ` Petr Tesarik
2020-09-25  9:44                   ` Heiner Kallweit
2020-09-25  9:52                     ` Petr Tesarik
2020-09-25 12:56                       ` Petr Tesarik
2020-09-25 14:47                         ` Heiner Kallweit
2020-09-29 19:07                           ` Petr Tesarik
2020-09-29 19:41                             ` Heiner Kallweit
2020-09-29 20:08                             ` Hans de Goede
2020-09-29 20:29                               ` Hans de Goede
2020-09-29 20:35                               ` Heiner Kallweit
2020-09-29 20:42                                 ` Heiner Kallweit
2020-09-30  9:04                                 ` Hans de Goede
2020-09-30 15:47                                   ` Heiner Kallweit
2020-09-30 16:41                                     ` Petr Tesarik
2020-09-30 17:13                                       ` Heiner Kallweit
2020-09-30 17:32                                       ` Petr Tesarik
2020-09-30 18:00                                         ` Petr Tesarik
2020-09-30 20:11                                           ` Heiner Kallweit
2020-09-30 21:44                                             ` Petr Tesarik
2020-10-01  6:14                                               ` Heiner Kallweit
2020-09-30 18:10                                     ` Petr Tesarik
2020-09-29 21:17                               ` Petr Tesarik
2020-07-15 15:25 ` Heiner Kallweit

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