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On Mon, 6 Aug 2018 02:38:28 -0400 Philip Webb wrote: |
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> 180805 Philip Webb wrote: |
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> > 180804 Andrew Savchenko wrote: |
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> >> Your xorg.conf -- or a file from xorg.conf.d directory -- |
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> >> must contain the following : |
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> >> |
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> >> Section "Device" |
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> >> Identifier "Card1" |
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> >> Driver "modesetting" |
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> >> ... (some options may follow) |
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> >> EndSection |
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> |
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> I've done that, as described in my previous msg, without success. |
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> |
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> Then I noticed that Wiki says the kernel needs recompiling |
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> with 'Drivers->Graphics-><*>DirectRenderingManager |
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> <*>NouveauCards' ; |
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Well, that was too obvious to mention :) |
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> I also unset the "<->Backlight ... " just below, as I don't need it. |
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> The new kernel is noticeably bigger than the previous version ; |
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> I copied it to /boot as usual, updated lilo.conf & ran Lilo ; |
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> the new kernel (called 4.14.52b) booted successfully, |
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> but neither Nouveau nor Nvidia would start ; |
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> even worse, neither would start with the previous version 4.14.52 , |
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> which had been working with Nvidia for some time. |
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> |
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> The kernel log stops after several repeats of the lines : |
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> |
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> kernel: nvidia: Unknown symbol backlight_device_unregister (err 0) |
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> kernel: nvidia: Unknown symbol backlight_device_register (err 0) |
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You need to rebuild nvidia-drivers. As a rule of thumb after each |
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kernel update (or major config change) one must rebuild |
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external kernel modules: |
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emerge -av @module-rebuild |
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> Finally, I booted into kernel 4.9.95 & Nvidia still starts there. |
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> |
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> This is turning into a nightmare. It all started when 4.14.52 |
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> couldn't find my scanner, which 4.9.16 had no trouble with, |
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> & then I found I couldn't test 4.9.16, as Nvidia no longer worked with it. |
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> To test 4.9.16 it seems sensible to try Nouveau instead of Nvidia, |
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> but that has led to a further tangle. |
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> |
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> I suspect the problem with the scanner is that the Epson driver |
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> needs an update to work with the most recent kernels. |
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> That's something I'll have to take up with Epson, if I can. |
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What is your scanner model? Are you using sane-epson2 and the |
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latest sane version? It really shouldn't depend on the kernel |
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unless you are missing some crucial (e.g. usb) drivers. |
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> However, the Nouveau/Nvidia mess is something I sb able to sort out. |
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> Can anyone suggest what's gone wrong & how to put it right ? |
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You have not stated what is wrong with your Nouveau + kernel |
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4.14.52 setup. Please provide Xorg logs. |
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Best regards, |
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Andrew Savchenko |
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