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Hahh, it's a nice one! |
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Since I'm using radeon KMS, I would happily enable the option. |
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Any of you aware other software might fail by toggling the option? |
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-- |
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dr Tóth Attila, Radiológus, 06-20-825-8057 |
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Attila Toth MD, Radiologist, +36-20-825-8057 |
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|
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2013.Január 31.(Cs) 00:32 időpontban Dave Armstrong ezt írta: |
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> Patching the Linux kernel to disable the sys_iopl and sys_ioperm system |
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> calls (e.g., by setting CONFIG_GRKERNSEC_IO=y) used to cause the xserver |
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> to fail to start even with KMS-enabled drivers -- at least in the case |
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> of the in-kernel radeon driver. |
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> |
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> I don't know what recent changes are responsible but for whatever |
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> reason, X now works fine without the aforementioned system calls on the |
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> same hardware. |
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> |
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> Unfortunately, it doesn't work on another machine using the Intel driver |
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> and same X/kernel versions. It fails with the error: "failed to set |
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> IOPL". Does anyone know why the Intel, but not Radeon driver, might be |
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> failing? I don't have any particular knowledge of the inner-workings of |
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> the graphics stack |
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> |
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> A quick search turned up the following on the X mailing list: "Fix |
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> initialization when iopl is forbidden": |
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> http://lists.x.org/archives/xorg-devel/2012-September/033656.html |
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> |
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> http://cgit.freedesktop.org/~ajax/xserver/patch/?id=d88fb00d791c2b19cf9dd244276838aba3a6b442 |
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> |
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> The above patch applies to x11-base/xorg-server-1.13.2 (with a fuzz |
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> factor of 2 but it's good) but I haven't had a chance to test it on the |
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> affected machine. I'll post a followup if it fixes the problem. |
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> |
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> Dave |
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> |
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> |
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