https://bugs.freedesktop.org/show_bug.cgi?id=66022
--- Comment #5 from Mr-4 <[email protected]> --- Some more feedback on this, after I was able to test this more thoroughly: The automatic thermal management seems, at least for my card (Chipset G71 - NV49), completely buggy! After hibernate/resume, when my machine doesn't lock up a few seconds after restore is complete (see Comment #4), I also get the following possible scenarios developing: pwm1=0 pwm1_enable=2 pwm1_max=100 pwm1_min=0 temp1_auto_point1_pwm=100 temp1_auto_point1_temp=90000 temp1_auto_point1_temp_hyst=3000 temp1_crit=115000 temp1_crit_hyst=2000 temp1_emergency=135000 temp1_emergency_hyst=5000 temp1_input=28000 temp1_max=95000 temp1_max_hyst=3000 update_rate=1000 [...] pwm1=0 pwm1_enable=2 pwm1_max=100 pwm1_min=0 temp1_auto_point1_pwm=100 temp1_auto_point1_temp=90000 temp1_auto_point1_temp_hyst=3000 temp1_crit=115000 temp1_crit_hyst=2000 temp1_emergency=135000 temp1_emergency_hyst=5000 temp1_input=52000 temp1_max=95000 temp1_max_hyst=3000 update_rate=1000 As evident, pwm1_enable is restored, but the nouveau driver doesn't seem to bother with any sort of fan management at all (the pwm1 is reduced from 100 to 0 after restore and it stays there for ever!). When I do this: echo 2 > /sys/class/hwmon/hwmon0/pwm1_enable I still get: pwm1=0 pwm1_enable=2 pwm1_max=100 pwm1_min=0 temp1_auto_point1_pwm=100 temp1_auto_point1_temp=90000 temp1_auto_point1_temp_hyst=3000 temp1_crit=115000 temp1_crit_hyst=2000 temp1_emergency=135000 temp1_emergency_hyst=5000 temp1_input=55000 temp1_max=95000 temp1_max_hyst=3000 update_rate=1000 Next, I tried the following sequence: echo 1 > /sys/class/hwmon/hwmon0/pwm1_enable echo 2 > /sys/class/hwmon/hwmon0/pwm1_enable pwm1=26 pwm1_enable=2 pwm1_max=100 pwm1_min=0 temp1_auto_point1_pwm=100 temp1_auto_point1_temp=90000 temp1_auto_point1_temp_hyst=3000 temp1_crit=115000 temp1_crit_hyst=2000 temp1_emergency=135000 temp1_emergency_hyst=5000 temp1_input=53000 temp1_max=95000 temp1_max_hyst=3000 update_rate=1000 [...] pwm1=26 pwm1_enable=2 pwm1_max=100 pwm1_min=0 temp1_auto_point1_pwm=100 temp1_auto_point1_temp=90000 temp1_auto_point1_temp_hyst=3000 temp1_crit=115000 temp1_crit_hyst=2000 temp1_emergency=135000 temp1_emergency_hyst=5000 temp1_input=47000 temp1_max=95000 temp1_max_hyst=3000 update_rate=1000 As evident, the pwm1 "twitched" for a bit, and then "froze" at 26%, reducing the card temperature from about 55 degrees to 47. I then did this: echo 1 > /sys/class/hwmon/hwmon0/pwm1_enable echo 100 > /sys/class/hwmon/hwmon0/pwm1 echo 2 > /sys/class/hwmon/hwmon0/pwm1_enable pwm1=88 pwm1_enable=2 pwm1_max=100 pwm1_min=0 temp1_auto_point1_pwm=100 temp1_auto_point1_temp=90000 temp1_auto_point1_temp_hyst=3000 temp1_crit=115000 temp1_crit_hyst=2000 temp1_emergency=135000 temp1_emergency_hyst=5000 temp1_input=44000 temp1_max=95000 temp1_max_hyst=3000 update_rate=1000 [...] pwm1=13 pwm1_enable=2 pwm1_max=100 pwm1_min=0 temp1_auto_point1_pwm=100 temp1_auto_point1_temp=90000 temp1_auto_point1_temp_hyst=3000 temp1_crit=115000 temp1_crit_hyst=2000 temp1_emergency=135000 temp1_emergency_hyst=5000 temp1_input=47000 temp1_max=95000 temp1_max_hyst=3000 update_rate=1000 pwm1=13 pwm1_enable=2 pwm1_max=100 pwm1_min=0 temp1_auto_point1_pwm=100 temp1_auto_point1_temp=90000 temp1_auto_point1_temp_hyst=3000 temp1_crit=115000 temp1_crit_hyst=2000 temp1_emergency=135000 temp1_emergency_hyst=5000 temp1_input=58000 temp1_max=95000 temp1_max_hyst=3000 update_rate=1000 Again, pwm1 "froze" at a value of 13 and stayed there. Since I do not want to burn my card out, I then switched to manual and set the pwm1 value to 100. There are 3 additional bugs I discovered also, but will submit a separate reports (and patches) for these. -- You are receiving this mail because: You are the assignee for the bug.
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