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On 05/18/2017 11:32 PM, Nikos Chantziaras wrote: |
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> On 05/18/2017 05:06 PM, Daniel Frey wrote: |
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>> On 05/17/2017 03:35 PM, Kai Krakow wrote: |
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>>> |
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>>> It also enables me to finally use UEFI and suspend to RAM again |
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>>> with NVIDIA proprietary without a dead framebuffer after resume. ;-) |
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>> |
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>> I have had this problem for years and thought it was a bad card. |
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>> Replaced it recently, still have the problem. |
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> |
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> This is usually due to CSM being enabled in the mainboard's settings. If |
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> you use UEFI with the EFI console kernel driver, but you still get this |
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> in dmesg: |
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> |
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> NVRM: Your system is not currently configured to drive a VGA console |
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> NVRM: on the primary VGA device. The NVIDIA Linux graphics driver |
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> NVRM: requires the use of a text-mode VGA console. Use of other console |
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> NVRM: drivers including, but not limited to, vesafb, may result in |
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> NVRM: corruption and stability problems, and is not supported. |
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> |
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> then CSM is the reason. One of the issues is restoring the framebuffer |
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> after resuming. |
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> |
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> CSM is the "Compatibility Support Module" of UEFI. When enabled, the |
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> graphics card is being initialized by CSM, not by UEFI, and the nvidia |
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> driver doesn't fully support this. |
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> |
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> Some mainboards allow you to disable CSM. Unfortunately, not all do. |
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> |
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> |
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The PC in question isn't a UEFI BIOS though, it's from 2007 and has a |
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plain 'ol BIOS setup. |
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Dan |
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