I understand that 'UseDisplayDevice "None"' isn't required for headless GPUs, but what you're saying below implies that that directive isn't required for non-headless GPUs either. That is the source of my confusion.
DRC On 3/2/21 12:38 PM, Quincy Wofford wrote: > Yes, I think you're right that the documentation is correct. > > My issue is a special case. I have one xorg config file that I want to > use for many devices and GPUs. If I can avoid special case > configurations, I want to. For me, it makes sense to remove this > option and monitor user feedback from problems. Some quick tests > indicate that, with Nvidia driver v455.32.00, this option is not > required for any of the systems where the universal xorg config is > deployed. > > On Tue, Mar 2, 2021 at 11:31 AM DRC <[email protected] > <mailto:[email protected]>> wrote: > > Well, then I don't understand what action needs to be taken. > https://virtualgl.org/Documentation/HeadlessNV already says "Leave > out --use-display-device=None if the GPU is headless, i.e. if it > has no display outputs." That seems like a correct statement, > given what you're saying. > > DRC > > On 3/2/21 12:16 PM, Jason Edgecombe wrote: >> Yes, it looks like it. >> >> Here is an Xorg snippet for display :1 from one of my RHEL7 >> servers with an NVvidia Quadro M2000 card.: >> >> Section "Screen" >> Identifier "Screen0" >> Device "Device0" >> Monitor "Monitor0" >> DefaultDepth 24 >> Option "AllowEmptyInitialConfiguration" "True" >> Option "UseDisplayDevice" "none" >> SubSection "Display" >> Virtual 1920 1200 >> Depth 24 >> EndSubSection >> EndSection >> >> >> The above server has a Matrox graphics card for the console and >> the M2000 handles VirtualGL. >> >> FYI, There is a quirk where Xorg still blanks the console when >> the Xorg on :1 is active. I haven't figured out how to fix that. >> >> Jason >> >> >> --------------------------------------------------------------------------- >> Jason Edgecombe | Linux Administrator >> UNC Charlotte | Office of OneIT >> 9201 University City Blvd. | Charlotte, NC 28223-0001 >> Phone: 704-687-1943 <tel:704-687-1943> >> [email protected] <mailto:[email protected]> | >> http://engr.uncc.edu | Facebook >> >> --------------------------------------------------------------------------- >> If you are not the intended recipient of this transmission or a >> person responsible for delivering it to the intended recipient, >> any disclosure, copying, distribution, or other use of any of the >> information in this transmission is strictly prohibited. If you >> have received this transmission in error, please notify me >> immediately by reply e-mail or by telephone at >> 704-687-1943 <tel:704-687-1943>. Thank you. >> >> >> On Tue, Mar 2, 2021 at 1:05 PM DRC <[email protected] >> <mailto:[email protected]>> wrote: >> >> OK, so does that mean that 'UseDisplayDevice "None"' is still >> supported with GPUs that have display connections? If not, >> then how would one specify headless mode with those GPUs? >> >> On 3/2/21 12:00 PM, Jason Edgecombe wrote: >>> NVidia Tesla's are designed as GPU compute cards and >>> Graphics accelerators. They literally don't have any >>> VGA/DisplayPort/HDMI ports on the back of the card. lspci >>> shows them as a "3D Controller" instead of a VGA display card. >>> >>> Sincerely, >>> Jason >>> >>> --------------------------------------------------------------------------- >>> Jason Edgecombe | Linux Administrator >>> UNC Charlotte | Office of OneIT >>> 9201 University City Blvd. | Charlotte, NC 28223-0001 >>> Phone: 704-687-1943 <tel:704-687-1943> >>> [email protected] <mailto:[email protected]> | >>> http://engr.uncc.edu | Facebook >>> >>> --------------------------------------------------------------------------- >>> If you are not the intended recipient of this transmission >>> or a person responsible for delivering it to the intended >>> recipient, any disclosure, copying, distribution, or other >>> use of any of the information in this transmission is >>> strictly prohibited. If you have received this transmission >>> in error, please notify me immediately by reply e-mail or by >>> telephone at >>> 704-687-1943 <tel:704-687-1943>. Thank you. >>> >>> >>> On Tue, Mar 2, 2021 at 12:46 PM DRC <[email protected] >>> <mailto:[email protected]>> wrote: >>> >>> [*Caution*: Email from External Sender. Do not click or >>> open links or attachments unless you know this sender.] >>> >>> >>> I don't understand how the driver knows to treat the GPU >>> as headless if you don't specify 'UseDisplayDevice >>> "None"' in xorg.conf. >>> >>> On 3/2/21 11:29 AM, qwofford wrote: >>>> The headless mode works for all GPUs I've tested so far >>>> without UseDisplayDevice "None", including V100's. I'm >>>> thinking the "--use-display-device=None" breaks some >>>> subset of headless GPU/driver combinations. So...beyond >>>> some Nvidia driver version, some GPU's will break with >>>> this option. All GPU's I've tested work OK without this >>>> option, at Nvidia driver 455.32.00. >>>> >>>> DRC, let me know if you want me to do some >>>> troubleshooting for you. Happy to help the project >>>> where I can. I am removing this from option from our >>>> xorg.conf deployment mechanism. If I get any >>>> complaints, I'll dig in and let you know wht I find. >>>> >>>> On Tuesday, March 2, 2021 at 10:11:30 AM UTC-7 DRC wrote: >>>> >>>> What do they propose instead? Is headless >>>> operation no longer supported with Tesla GPUs? >>>> >>>> On 3/2/21 11:03 AM, Youssef GHORBAL wrote: >>>>> Hi, >>>>> >>>>> Last time I asked Nvidia about this very message >>>>> they give me this feedback: >>>>> >>>>> "This is due to a change in our driver. And you >>>>> are right, you need to remove the Option >>>>> "UseDisplayDevice" "none" from the Xorg conf file. >>>>> See release not >>>>> here: >>>>> https://docs.nvidia.com/datacenter/tesla/tesla-release-notes-440-3301/index.html >>>>> (section >>>>> 1.3 Known Issues / NoScanout Mode) >>>>> As you pointed out this is harmless. Nevertheless, >>>>> I am hoping this will be improved in a future >>>>> release." >>>>> >>>>> Bascially, the error message is somehow misleading >>>>> and has nothing to do with GRID technology at all. >>>>> >>>>> Youssef >>>>> -------------------- >>>>>> On 2 Mar 2021, at 17:42, qwofford >>>>>> <[email protected]> wrote: >>>>>> >>>>>> Hello, >>>>>> >>>>>> I'm using VirtualGL 2.6.2 with a Tesla V100 in >>>>>> headless mode, and NVIDIA driver v455.32.00. It >>>>>> appears that my config file, as generated by the >>>>>> Headless Nvidia mini How-To, is conflicting with >>>>>> the V100 as configured. >>>>>> >>>>>> (EE) NVIDIA(GPU-0): UseDisplayDevice "None" is >>>>>> not supported with GRID >>>>>> (EE) NVIDIA(GPU-0): displayless >>>>>> >>>>>> Is this something you've seen before? Looking at >>>>>> how to disable GRID vGPU support now, which I >>>>>> hope will solve the problem... >>>>>> >>>>>> Thanks, >>>>>> Quincy >>>>>> >>>>>> -- >>>>>> You received this message because you are >>>>>> subscribed to the Google Groups "VirtualGL User >>>>>> Discussion/Support" group. >>>>>> To unsubscribe from this group and stop receiving >>>>>> emails from it, send an email to >>>>>> [email protected]. >>>>>> To view this discussion on the web visit >>>>>> >>>>>> https://groups.google.com/d/msgid/virtualgl-users/f94a8abe-22fd-442c-95ab-da7d6b61cbbbn%40googlegroups.com >>>>>> >>>>>> <https://urldefense.com/v3/__https://groups.google.com/d/msgid/virtualgl-users/f94a8abe-22fd-442c-95ab-da7d6b61cbbbn*40googlegroups.com?utm_medium=email&utm_source=footer__;JQ!!JFdNOqOXpB6UZW0!-Bh5kXOukJMv6nOXNnur-Vsywv7tlZ8Oqhgzdy0xdiwCiv8-HocmPCOVoT1CU4t6mw6wm3JK$>. >>>>> >>>>> -- >>>>> You received this message because you are >>>>> subscribed to the Google Groups "VirtualGL User >>>>> Discussion/Support" group. >>>>> To unsubscribe from this group and stop receiving >>>>> emails from it, send an email to >>>>> [email protected]. >>>>> To view this discussion on the web visit >>>>> >>>>> https://groups.google.com/d/msgid/virtualgl-users/E626C2EF-A528-443C-8246-3A8B03FD58E0%40pasteur.fr >>>>> >>>>> <https://groups.google.com/d/msgid/virtualgl-users/E626C2EF-A528-443C-8246-3A8B03FD58E0%40pasteur.fr?utm_medium=email&utm_source=footer>. >>>> >>>> -- >>>> You received this message because you are subscribed to >>>> the Google Groups "VirtualGL User Discussion/Support" >>>> group. >>>> To unsubscribe from this group and stop receiving >>>> emails from it, send an email to >>>> [email protected] >>>> <mailto:[email protected]>. >>>> To view this discussion on the web visit >>>> >>>> https://groups.google.com/d/msgid/virtualgl-users/16ede473-5b78-44ee-9248-22271bef10a9n%40googlegroups.com >>>> >>>> <https://groups.google.com/d/msgid/virtualgl-users/16ede473-5b78-44ee-9248-22271bef10a9n%40googlegroups.com?utm_medium=email&utm_source=footer>. >>> -- >>> You received this message because you are subscribed to >>> the Google Groups "VirtualGL User Discussion/Support" group. >>> To unsubscribe from this group and stop receiving emails >>> from it, send an email to >>> [email protected] >>> <mailto:[email protected]>. >>> To view this discussion on the web visit >>> >>> https://groups.google.com/d/msgid/virtualgl-users/cf378d92-6b5d-30d0-9ab6-8e927a6137ab%40virtualgl.org >>> >>> <https://groups.google.com/d/msgid/virtualgl-users/cf378d92-6b5d-30d0-9ab6-8e927a6137ab%40virtualgl.org?utm_medium=email&utm_source=footer>. >>> >>> -- >>> You received this message because you are subscribed to the >>> Google Groups "VirtualGL User Discussion/Support" group. >>> To unsubscribe from this group and stop receiving emails >>> from it, send an email to >>> [email protected] >>> <mailto:[email protected]>. >>> To view this discussion on the web visit >>> >>> https://groups.google.com/d/msgid/virtualgl-users/CAAR6MGC-%3DVVQtWPoEMuAAC4NGptzm8b4jwPSkbPcsS9rmijYKA%40mail.gmail.com >>> >>> <https://groups.google.com/d/msgid/virtualgl-users/CAAR6MGC-%3DVVQtWPoEMuAAC4NGptzm8b4jwPSkbPcsS9rmijYKA%40mail.gmail.com?utm_medium=email&utm_source=footer>. >> -- >> You received this message because you are subscribed to the >> Google Groups "VirtualGL User Discussion/Support" group. >> To unsubscribe from this group and stop receiving emails from >> it, send an email to >> [email protected] >> <mailto:[email protected]>. >> To view this discussion on the web visit >> >> https://groups.google.com/d/msgid/virtualgl-users/df2bf3fe-3b43-f55e-c629-e01faeb554c2%40virtualgl.org >> >> <https://groups.google.com/d/msgid/virtualgl-users/df2bf3fe-3b43-f55e-c629-e01faeb554c2%40virtualgl.org?utm_medium=email&utm_source=footer>. >> >> -- >> You received this message because you are subscribed to the >> Google Groups "VirtualGL User Discussion/Support" group. >> To unsubscribe from this group and stop receiving emails from it, >> send an email to [email protected] >> <mailto:[email protected]>. >> To view this discussion on the web visit >> >> https://groups.google.com/d/msgid/virtualgl-users/CAAR6MGBS9%3DDzBv6mC-q0Ct%2BvdWM-1k9_3LfEwZUnjEFJCn0tyw%40mail.gmail.com >> >> <https://groups.google.com/d/msgid/virtualgl-users/CAAR6MGBS9%3DDzBv6mC-q0Ct%2BvdWM-1k9_3LfEwZUnjEFJCn0tyw%40mail.gmail.com?utm_medium=email&utm_source=footer>. > -- > You received this message because you are subscribed to the Google > Groups "VirtualGL User Discussion/Support" group. > To unsubscribe from this group and stop receiving emails from it, > send an email to [email protected] > <mailto:[email protected]>. > To view this discussion on the web visit > > https://groups.google.com/d/msgid/virtualgl-users/d33f1d01-209e-4511-b933-8ad6dc160c4f%40virtualgl.org > > <https://groups.google.com/d/msgid/virtualgl-users/d33f1d01-209e-4511-b933-8ad6dc160c4f%40virtualgl.org?utm_medium=email&utm_source=footer>. > > -- > You received this message because you are subscribed to the Google > Groups "VirtualGL User Discussion/Support" group. > To unsubscribe from this group and stop receiving emails from it, send > an email to [email protected] > <mailto:[email protected]>. > To view this discussion on the web visit > https://groups.google.com/d/msgid/virtualgl-users/CA%2BD-2wnSq22GoSha%2B%2BWTLcyU8A98tevJjgRzE2LjCYu8xkGNTQ%40mail.gmail.com > <https://groups.google.com/d/msgid/virtualgl-users/CA%2BD-2wnSq22GoSha%2B%2BWTLcyU8A98tevJjgRzE2LjCYu8xkGNTQ%40mail.gmail.com?utm_medium=email&utm_source=footer>. -- You received this message because you are subscribed to the Google Groups "VirtualGL User Discussion/Support" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/virtualgl-users/03bb6c34-dc6a-b3f6-5925-43ac4b47593c%40virtualgl.org.
