From mboxrd@z Thu Jan 1 00:00:00 1970 From: Frank Scheiner Subject: Re: Ultra5 successful install - PGX64 issues Date: Sun, 22 Apr 2018 21:17:25 +0200 Message-ID: <5902c913-93a2-bb5f-5fd6-b45bcff94158@web.de> References: <6a4e3490-dd3e-5832-43be-dba8211ce6e4@physik.fu-berlin.de> <16600fdc-6bba-1e2d-f106-560b8ea366c8@physik.fu-berlin.de> <9671ecea-1353-df1c-ebbd-24a5b7d3008b@oetec.com> <103f23dc-0d00-2ca1-fb98-271d1e03ad90@web.de> <20180420112426.3c8be653@wim.jer> <5f57a530-c9e8-0fbd-4eba-ba6995320c10@bell.net> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Cc: Helge Deller , debian-hppa@lists.debian.org, linux-parisc , Dennis Clarke To: John David Anglin , Jeroen Roovers Return-path: In-Reply-To: <5f57a530-c9e8-0fbd-4eba-ba6995320c10@bell.net> Resent-Message-ID: List-Id: linux-parisc.vger.kernel.org List-Id: List-URL: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Archive: https://lists.debian.org/msgid-search/5902c913-93a2-bb5f-5fd6-b45bcff94158@web.de On 04/21/2018 02:22 AM, John David Anglin wrote: > From the manual, it seems the 10BASE-T port is half duplex (CSMA/CD). > The MAU > interface is definitely half duplex and the word duplex is not mentioned > in the manual. I also didn't find any info about half-/full-duplex in the two manuals I have at hand for the 712/80 ("Service Handbook" and "Technical Reference Manual"). To be sure, which one did you consult? > > The 10BASE-T port probably doesn't support auto negotiation, so you will > need to manually > set the switch port to 10BASE-T half duplex if it doesn't automatically > configure to this mode > when auto negotiation fails. Did this at first but then went for full-duplex again. Today I started with full-duplex and actively cooling the heatsink (now smoothed and with fresh thermal grease applied) of the 712/80's processor, but that didn't help alone. The issue hit me after entering the password during login. Then I reconfigured half-duplex and tried again. The machine now worked through the whole login and I could also do an `apt update` without issues afterwards. Then I let it alone for about twenty minutes and on return I did an `apt list --upgradable` which triggered the issue again. :-/ > > Some switches support a half-duplex back pressure form of flow control. I'll try that now. According to the documentation my switch can create back-pressure as form of flow control. Cheers, Frank