Re: [systemd-devel] Console screen blanks while long running service executes
On 8/12/15 7:22 PM, Chris Bell wrote: > On 2015-08-12 20:19, Harry Goldschmitt wrote: >> I just modified my grub kernel command line to add the consoleblank=0 >> parameter. That isn't the problem. First consoleblank is the kernel >> screensaver and according to the documentation it kicks in after 15 >> minutes by default. >> >> What I see is a few kernel driver start up messages. Then the console >> screen blanks for about 10 seconds. Then multi-user boot completes. > The only other thing I can think of is when modesetting kicks in and is > configuring your graphics adapter? You could try adding the 'nomodeset' > kernel parameter to your boot, but keep in mind that you will lose > kernel modesetting, which could potentially cause issues with your > system. I'm not sure what else would cause the screen to 'blank' like > you are describing at that point in the boot. > > --Chris > I found it. Not a systemd issue at all. "console=ttyS0" had been dropped from the kernel command line. Without it my Dell iDrac virtual console went grey after GRUB boot. After I added the parameter the console stayed live and I could echo errors to /dev/tty1. I know everything I need is available by journalctl, but the echos help when the system doesn't come up far enough for journalctl to work. Thanks for looking at this. -- The information contained in this transmission may be confidential. Any disclosure, copying, or further distribution of confidential information is not permitted unless such privilege is explicitly granted in writing by Quantum. Quantum reserves the right to have electronic communications, including email and attachments, sent across its networks filtered through anti virus and spam software programs and retain such messages in order to comply with applicable data security and retention requirements. Quantum is not responsible for the proper and complete transmission of the substance of this communication or for any delay in its receipt. ___ systemd-devel mailing list systemd-devel@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/systemd-devel
Re: [systemd-devel] Console screen blanks while long running service executes
On 2015-08-12 20:19, Harry Goldschmitt wrote: I just modified my grub kernel command line to add the consoleblank=0 parameter. That isn't the problem. First consoleblank is the kernel screensaver and according to the documentation it kicks in after 15 minutes by default. What I see is a few kernel driver start up messages. Then the console screen blanks for about 10 seconds. Then multi-user boot completes. The only other thing I can think of is when modesetting kicks in and is configuring your graphics adapter? You could try adding the 'nomodeset' kernel parameter to your boot, but keep in mind that you will lose kernel modesetting, which could potentially cause issues with your system. I'm not sure what else would cause the screen to 'blank' like you are describing at that point in the boot. --Chris ___ systemd-devel mailing list systemd-devel@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/systemd-devel
Re: [systemd-devel] Console screen blanks while long running service executes
I just modified my grub kernel command line to add the consoleblank=0 parameter. That isn't the problem. First consoleblank is the kernel screensaver and according to the documentation it kicks in after 15 minutes by default. What I'm doing for testing is: 1) systemctl set-default foo.target 2) foo.target.wants/foo.service 3) foo.service invokes /mydir/foo.sh 4) /mydir/foo.sh consists of echo "foo.sh starting to sleep" logger "foo.sh starting to sleep" sleep 10 echo "foo.sh after sleep" logger "foo.sh after sleep" systemctl isolate multi-user.target What I see is a few kernel driver start up messages. Then the console screen blanks for about 10 seconds. Then multi-user boot completes. What I'm hoping to see is: foo.sh starting to sleep foo.sh after sleep -Original Message- From: systemd-devel [mailto:systemd-devel-boun...@lists.freedesktop.org] On Behalf Of Tomasz Torcz Sent: Wednesday, August 12, 2015 12:26 PM To: systemd-devel@lists.freedesktop.org Subject: Re: [systemd-devel] Console screen blanks while long running service executes On Wed, Aug 12, 2015 at 06:41:35PM +, Harry Goldschmitt wrote: > I have a target that runs a service during boot on CentOS 7.1. The > service takes a minimum of 30 sec. to run and a maximum of 15 min. > While it's running, the console screen blanks. Before my service runs > I see the expected roll call of services running with [OK], etc. After > my service completes, the console comes back to life. My service uses > echo to output progress messages that show up in the journal. Is there > a way to keep the console from blanking? > Put "consoleblank=0" in the kernel command line. -- Tomasz Torcz "Never underestimate the bandwidth of a station xmpp: zdzich...@chrome.plwagon filled with backup tapes." -- Jim Gray ___ systemd-devel mailing list systemd-devel@lists.freedesktop.org https://urldefense.proofpoint.com/v2/url?u=http-3A__lists.freedesktop.org_mailman_listinfo_systemd-2Ddevel&d=BQIGaQ&c=8S5idjlO_n28Ko3lg6lskTMwneSC-WqZ5EBTEEvDlkg&r=naTX-IF7_QKyhqVve7SqbI_X3j-x4BDG1qRD3DBP5SU&m=U0VIxjS1yDAK5lMWm8xgxAd7UGv8CV6Jpj1MkgASCI8&s=8TInZVo_Ej5hIrZnvTp0PuR6KW_arTD2IcCCle4W3f4&e= -- The information contained in this transmission may be confidential. Any disclosure, copying, or further distribution of confidential information is not permitted unless such privilege is explicitly granted in writing by Quantum. Quantum reserves the right to have electronic communications, including email and attachments, sent across its networks filtered through anti virus and spam software programs and retain such messages in order to comply with applicable data security and retention requirements. Quantum is not responsible for the proper and complete transmission of the substance of this communication or for any delay in its receipt. ___ systemd-devel mailing list systemd-devel@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/systemd-devel
Re: [systemd-devel] Console screen blanks while long running service executes
On Wed, Aug 12, 2015 at 06:41:35PM +, Harry Goldschmitt wrote: > I have a target that runs a service during boot on CentOS 7.1. The service > takes a minimum of 30 sec. to run and a maximum of 15 min. While it's running, > the console screen blanks. Before my service runs I see the expected roll call > of services running with [OK], etc. After my service completes, the console > comes back to life. My service uses echo to output progress messages that show > up in the journal. Is there a way to keep the console from blanking? > Put "consoleblank=0" in the kernel command line. -- Tomasz Torcz "Never underestimate the bandwidth of a station xmpp: zdzich...@chrome.plwagon filled with backup tapes." -- Jim Gray ___ systemd-devel mailing list systemd-devel@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/systemd-devel
[systemd-devel] Console screen blanks while long running service executes
I have a target that runs a service during boot on CentOS 7.1. The service takes a minimum of 30 sec. to run and a maximum of 15 min. While it's running, the console screen blanks. Before my service runs I see the expected roll call of services running with [OK], etc. After my service completes, the console comes back to life. My service uses echo to output progress messages that show up in the journal. Is there a way to keep the console from blanking? -- The information contained in this transmission may be confidential. Any disclosure, copying, or further distribution of confidential information is not permitted unless such privilege is explicitly granted in writing by Quantum. Quantum reserves the right to have electronic communications, including email and attachments, sent across its networks filtered through anti virus and spam software programs and retain such messages in order to comply with applicable data security and retention requirements. Quantum is not responsible for the proper and complete transmission of the substance of this communication or for any delay in its receipt. ___ systemd-devel mailing list systemd-devel@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/systemd-devel
