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vesa: timeout blank/unblank operation if it gets stuck

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This commit is contained in:
cinap_lenrek 2012-08-01 22:56:58 +02:00
parent 02acb1d4f0
commit 9caf93faa8
1 changed files with 9 additions and 0 deletions
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9
sys/src/9/pc/vgavesa.c
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@ -180,10 +180,19 @@ vesaproc(void*)
u.bx = 0x0101; u.bx = 0x0101;
else else
u.bx = 0x0001; u.bx = 0x0001;
/*
* dont wait forever here. some BIOS get stuck
* in i/o poll loop after blank/unblank for some
* reason. (Thinkpad A22p)
*/
procalarm(10000);
vbecall(&u); vbecall(&u);
poperror(); poperror();
} }
procalarm(0);
up->notepending = 0;
} }
cclose(cmem); cclose(cmem);
cclose(creg); cclose(creg);