Gentoo Archives: gentoo-user

From: Jack <ostroffjh@×××××××××××××××××.net>
To: gentoo-user@l.g.o
Subject: [gentoo-user] strange problem (no video output) on new PC
Date: Thu, 11 Jul 2019 22:32:01
1 I'm hoping the cumulative wisdom of the assembled masses might be able
2 to figure out what I'm clearly missing, assuming there IS something I'm
3 missing.
5 I've recently assembled a new PC, with an MSI B350-Tomahawk motherboard
6 and a Ryzen 5 2600 CPU. (We'll skip that I ended up actually buying an
7 older Ryzen just to upgrade the BIOS.) The problem is that I have now
8 tried three different PCI-E graphics cards, and have gotten no video
9 signal from any of them. I do get a video signal from an ancient PCI
10 graphics card. One of the cards is a very old Radeon, one is a
11 slightly less old nVidia, and the newest is (from lspci) "Advanced
12 Micro Devices, Inc. [AMD/ATI] Cape Verde XT [Radeon HD 7770/8760 / R7
13 250X]."
15 What I find particularly odd is that if I log in blind, and then issue
16 startx, X (startkde) seems to be running fine. I ssh in from another
17 PC, and the X log shows the Radeon driver loading, the monitor being
18 recognized on the appropriate connector, the EDID received, and the
19 right resolution being chosen. (Even without all the AMD drivers and
20 firmware loaded, at least it also seemed to start with the VESA driver,
21 but still no output signal.)
23 I can easily believe the old radeon card is dead, and possibly even the
24 nVidia card. However, given what I see in the logs with the new radeon
25 card, I find it hard to believe the card is actually defective. (Just
26 purchased used on eBay, so I do have to admit the possibilty.)
27 However, I have trouble imagining what else could be the problem. I've
28 tried two different cables (both of which work fine for the PCI card)
29 but both use DVI to VGA adaptors, although I can't imagine why that
30 would matter now, if they worked for a different card. I have ordered
31 a new DVI cable to go directly from the card to the monitor, so
32 hopefully I'll get that and be able to test it within a few days.
34 Can anyone else thing of what the problem might be, and if there is any
35 troubleshooting I could try?
37 Jack


Subject Author
Re: [gentoo-user] strange problem (no video output) on new PC Mick <michaelkintzios@×××××.com>