On Thursday, 11 July 2019 23:31:51 BST Jack wrote: > I'm hoping the cumulative wisdom of the assembled masses might be able > to figure out what I'm clearly missing, assuming there IS something I'm > missing. > > I've recently assembled a new PC, with an MSI B350-Tomahawk motherboard > and a Ryzen 5 2600 CPU. (We'll skip that I ended up actually buying an > older Ryzen just to upgrade the BIOS.) The problem is that I have now > tried three different PCI-E graphics cards, and have gotten no video > signal from any of them. I do get a video signal from an ancient PCI > graphics card. One of the cards is a very old Radeon, one is a > slightly less old nVidia, and the newest is (from lspci) "Advanced > Micro Devices, Inc. [AMD/ATI] Cape Verde XT [Radeon HD 7770/8760 / R7 > 250X]." > > What I find particularly odd is that if I log in blind, and then issue > startx, X (startkde) seems to be running fine. I ssh in from another > PC, and the X log shows the Radeon driver loading, the monitor being > recognized on the appropriate connector, the EDID received, and the > right resolution being chosen. (Even without all the AMD drivers and > firmware loaded, at least it also seemed to start with the VESA driver, > but still no output signal.) > > I can easily believe the old radeon card is dead, and possibly even the > nVidia card. However, given what I see in the logs with the new radeon > card, I find it hard to believe the card is actually defective. (Just > purchased used on eBay, so I do have to admit the possibilty.) > However, I have trouble imagining what else could be the problem. I've > tried two different cables (both of which work fine for the PCI card) > but both use DVI to VGA adaptors, although I can't imagine why that > would matter now, if they worked for a different card. I have ordered > a new DVI cable to go directly from the card to the monitor, so > hopefully I'll get that and be able to test it within a few days. > > Can anyone else thing of what the problem might be, and if there is any > troubleshooting I could try? > > Jack
Brief response for now: If dmesg after you login remotely shows the graphics card firmware is available in the kernel, radeon/nvidia drivers are loading and no errors are printed, then hardware wise your PC ought to be OK. If /var/log/Xorg.0.log shows no errors with drivers and monitor, then I don't know what to suggest other than following a process of elimination, by trying: - different cables - different monitor However, if cables or monitor were at fault I would expect warnings to show up in the log files. -- Regards, Mick
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