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