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[37.188.169.187]) by smtp.gmail.com with ESMTPSA id s15sm4234729wmj.41.2020.07.21.09.00.26 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 21 Jul 2020 09:00:26 -0700 (PDT) Date: Tue, 21 Jul 2020 18:00:25 +0200 From: Michal Hocko To: Alan Stern Cc: LKML , Greg KH , linux-usb@vger.kernel.org, "Rafael J. Wysocki" Subject: Re: kworker/0:3+pm hogging CPU Message-ID: <20200721160025.GP4061@dhcp22.suse.cz> References: <20200720143213.GJ4074@dhcp22.suse.cz> <20200720151255.GE1228057@rowland.harvard.edu> <20200720163355.GA4061@dhcp22.suse.cz> <20200720173807.GJ1228057@rowland.harvard.edu> <20200720174530.GB4061@dhcp22.suse.cz> <20200720174812.GK1228057@rowland.harvard.edu> <20200720181605.GC4061@dhcp22.suse.cz> <20200720200243.GA1244989@rowland.harvard.edu> <20200721055917.GD4061@dhcp22.suse.cz> <20200721143325.GB1272082@rowland.harvard.edu> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200721143325.GB1272082@rowland.harvard.edu> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue 21-07-20 10:33:25, Alan Stern wrote: [...] Thanks a lot for your analysis. The laptop is slowly dying so this can be related. > So yes, this looks like a hardware design error. Turning off > autosuspend by writing to the sysfs power/control file is probably the > best way to handle the problem. I can use that workaround. But it seems that this also prevents me from suspending the maching into RAM with PM: Some devices failed to suspend, or early wake event detected :/ If there is any workaround for that then I would be really happy but considering the overal state of the machine I suspect this is not the case. Thanks again for your great help! -- Michal Hocko SUSE Labs